{"id":62875,"date":"2026-07-09T06:02:00","date_gmt":"2026-07-09T04:02:00","guid":{"rendered":"https:\/\/cyclingceramic.com\/?p=62875"},"modified":"2026-07-08T11:47:02","modified_gmt":"2026-07-08T09:47:02","slug":"taille-galets-derailleur-shimano-sram","status":"publish","type":"post","link":"https:\/\/cyclingceramic.com\/fr\/pulley-wheel-size-shimano-sram\/","title":{"rendered":"Guide des tailles de galets de d\u00e9railleur : compatibilit\u00e9 Shimano vs SRAM"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"62875\" class=\"elementor elementor-62875\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5891723 e-con-full e-flex e-con e-parent\" data-id=\"5891723\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-660851e elementor-widget elementor-widget-html\" data-id=\"660851e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\n.green { color: #2d7a2d; font-weight: 500; }\n.red { color: #c0392b; }\n.callout { background: #f0f7f0; border-left: 4px solid #435655; padding: 16px 20px; margin: 24px 0; border-radius: 4px; }\n.bold-row td { font-weight: 600; border-top: 2px solid #435655; }\ntable { width: 100%; border-collapse: collapse; margin: 24px 0; }\nth { background: #435655; color: #fff; padding: 10px 14px; text-align: left; }\ntd { padding: 9px 14px; border-bottom: 1px solid #e0e0e0; }\n.faq-section h3 { color: #435655; margin-top: 20px; }\n<\/style>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"BlogPosting\",\n  \"headline\": \"Pulley Wheel Size Guide: Shimano vs SRAM Compatibility\",\n  \"description\": \"What size pulley wheels for Shimano and SRAM? Confirmed compatibility table by groupset, with upper vs lower tooth count and fitment guidance explained.\",\n  \"url\": \"https:\/\/cyclingceramic.com\/pulley-wheel-size-shimano-sram\/\",\n  \"datePublished\": \"2026-06-02\",\n  \"dateModified\": \"2026-06-02\",\n  \"author\": {\n    \"@type\": \"Person\",\n    \"name\": \"Ilan Lemos De Abreu\"\n  },\n  \"publisher\": {\n    \"@type\": \"Organization\",\n    \"name\": \"CyclingCeramic\",\n    \"url\": \"https:\/\/cyclingceramic.com\",\n    \"logo\": {\n      \"@type\": \"ImageObject\",\n      \"url\": \"https:\/\/cyclingceramic.com\/wp-content\/uploads\/cyclingceramic-logo.png\"\n    }\n  },\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/cyclingceramic.com\/pulley-wheel-size-shimano-sram\/\"\n  },\n  \"about\": [\n    {\"@type\": \"Thing\", \"name\": \"Derailleur pulley wheels\"},\n    {\"@type\": \"Thing\", \"name\": \"Jockey wheel size\"},\n    {\"@type\": \"Thing\", \"name\": \"Shimano groupset compatibility\"},\n    {\"@type\": \"Thing\", \"name\": \"SRAM groupset compatibility\"}\n  ],\n  \"keywords\": \"what size pulley wheels Shimano SRAM, pulley wheel size, jockey wheel size, derailleur pulley compatibility, 11T 12T pulley, Shimano SRAM jockey wheel\"\n}\n<\/script>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What size pulley wheels do I need for Shimano?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Most modern Shimano road groupsets use 11T upper and 11T lower pulley wheels. This applies to Dura-Ace R9100 (11-speed), Dura-Ace R9200 (12-speed), and Ultegra R8000 (11-speed). The CyclingCeramic replacement pulleys for these groupsets are 11T \/ 11T. Shimano MTB and the latest wide-range 12-speed groupsets can use larger tooth counts, so confirm your exact derailleur model before ordering. The safest method is to match your derailleur generation code, for example R9100 or R8000, to the compatibility selector on the product page.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What size pulley wheels do I need for SRAM?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"SRAM Red and Force AXS 12-speed road groupsets use 12T upper and 12T lower pulley wheels. The CyclingCeramic replacement for SRAM Red and Force AXS is 12T \/ 12T. SRAM uses a different bolt and cage specification from Shimano, so SRAM pulleys are not interchangeable with Shimano derailleurs even when the tooth count matches. SRAM Eagle mountain bike groupsets use larger pulleys and must be matched separately to the specific derailleur model.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are Shimano and SRAM pulley wheels interchangeable?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. You should never mix pulley wheels between Shimano, SRAM, and Campagnolo. Even when the tooth count is identical, the bolt diameter, cage width, and pulley body offset differ between brands. The Shimano and Campagnolo bolt fit is similar, but SRAM uses its own specification. Fitting the wrong brand of pulley can cause poor chain alignment, noisy running, and unreliable shifting. Always match the pulley wheel to the manufacturer and generation of your rear derailleur.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the upper and lower pulley wheel?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The upper pulley sits closest to the cassette and is called the guide pulley, often marked with a G. It steers the chain onto the correct sprocket and needs a small amount of lateral float to allow clean shifting. The lower pulley is the tension or idler pulley, and it keeps the chain taut through the cage. On most road groupsets both pulleys share the same tooth count, for example 11T \/ 11T on Shimano, but some groupsets such as Campagnolo EKAR use a larger lower pulley, written as 12T \/ 14T (upper \/ lower).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need to adjust my derailleur after fitting new pulley wheels?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"When you replace standard pulleys with new ones of the same tooth count, fitting is usually a direct swap and no major adjustment is required. It is still good practice to check the B-tension screw afterwards, since this sets the gap between the upper guide pulley and the cassette and controls shifting crispness. If you move to an oversized cage with larger pulleys, such as a 14\/19T road cage, the derailleur geometry changes and a full B-tension and limit check is needed. For groupset-specific fitment, see the CyclingCeramic derailleur pulley support page.\"\n      }\n    }\n  ]\n}\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b0c8290 e-flex e-con-boxed e-con e-parent\" data-id=\"b0c8290\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4c65cbe elementor-widget elementor-widget-text-editor\" data-id=\"4c65cbe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<article><section id=\"section-intro\"><section id=\"section-intro\">The short answer: most modern Shimano road groupsets use\u00a0<strong>11T \/ 11T<\/strong>\u00a0pulley wheels, and the first generation of SRAM Red and Force AXS uses\u00a0<strong>12T \/ 12T<\/strong>. The newest groupsets break that symmetry: SRAM RED E1 runs\u00a0<strong>12T \/ 14T<\/strong>, SRAM Red XPLR AXS 13-speed runs\u00a0<strong>14T \/ 16T<\/strong>, as well as EAGLE T-TYPE, and Campagnolo Super Record 13-speed uses its own 14T set. The brands are never interchangeable, even when the tooth count looks identical, because the bolt and cage specifications differ. That single rule, match the brand and the exact generation, prevents almost every fitment mistake. But to order with confidence you also need to know which tooth count your exact derailleur takes, what the upper and lower numbers actually mean, and when a replacement is a simple swap versus a change that needs the derailleur re-tuned. This guide gives you a confirmed compatibility table by groupset, explains the upper-versus-lower notation, and clarifies the difference between standard replacement pulleys and oversized cages so you order the right part the first time.<\/section><section id=\"section-1\"><h2>What Size Pulley Wheels Do You Need? Compatibility by Groupset<\/h2><p><a href=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17.png\"><img decoding=\"async\" class=\"size-large wp-image-61597 aligncenter\" src=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-819x1024.png\" alt=\"\" width=\"819\" height=\"1024\" srcset=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-819x1024.png 819w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-240x300.png 240w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-768x960.png 768w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-10x12.png 10w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17-600x750.png 600w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2022\/11\/Design-sans-titre-17.png 1080w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/><\/a><\/p><p>Pulley wheel size is dictated by your\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Derailleur\" target=\"_blank\" rel=\"nofollow noopener\">rear derailleur<\/a>, not by your cassette or your number of speeds alone. Each manufacturer designs the cage around a specific tooth count, and that tooth count is what you must match. The table below lists the confirmed CyclingCeramic replacement sizes for the current road and gravel groupsets, written as upper \/ lower.<\/p><table width=\"565\"><thead><tr><th>Groupset<\/th><th>Pulley Size (upper \/ lower)<\/th><\/tr><\/thead><tbody><tr><td>Shimano Dura-Ace R9100 (11-speed)<\/td><td class=\"green\">11T \/ 11T<\/td><\/tr><tr><td>Shimano Dura-Ace R9200 (12-speed)<\/td><td class=\"green\">11T \/ 11T<\/td><\/tr><tr><td>Shimano Ultegra R8000 \/ R8100 (11 &amp; 12-speed)<\/td><td class=\"green\">11T \/ 11T<\/td><\/tr><tr><td>Shimano GRX &amp; XTR (11 \/ 12-speed gravel &amp; MTB)<\/td><td class=\"green\">14T \/ 14T<\/td><\/tr><tr><td>SRAM Red \/ Force AXS (12-speed, 1st generation)<\/td><td class=\"green\">12T \/ 12T<\/td><\/tr><tr><td>SRAM RED E1 (latest 12-speed)<\/td><td class=\"green\">12T \/ 14T<\/td><\/tr><tr><td>SRAM Red XPLR AXS (13-speed gravel) \/ EAGLE T-TYPE<\/td><td class=\"green\">14T \/ 16T<\/td><\/tr><tr><td>SRAM XPLR (12-speed) \/ Eagle MTB<\/td><td class=\"green\">14T \/ 14T<\/td><\/tr><tr><td>Campagnolo Record \/ Chorus (11-speed)<\/td><td class=\"green\">11T \/ 11T<\/td><\/tr><tr><td>Campagnolo Super Record &amp; 12-speed<\/td><td class=\"green\">12T \/ 12T<\/td><\/tr><tr><td>Campagnolo Super Record Wireless (13-speed)<\/td><td class=\"green\">14T set<\/td><\/tr><tr><td>Campagnolo EKAR (13-speed gravel)<\/td><td class=\"green\">12T \/ 14T<\/td><\/tr><\/tbody><\/table><p>Three patterns stand out. Shimano road derailleurs consistently use matched\u00a0<strong>11T \/ 11T<\/strong>\u00a0pulleys across both 11-speed and 12-speed road generations, while Shimano gravel and MTB (GRX, XTR) move up to\u00a0<strong>14T<\/strong>. Early SRAM road AXS uses\u00a0<strong>12T \/ 12T<\/strong>, but the newest hardware, SRAM RED E1 and the 13-speed XPLR, adopts split sizes. Campagnolo spans the widest range, from 11T on classic Record up to the 13-speed EKAR at\u00a0<strong>12T \/ 14T<\/strong>, which is exactly why the upper \/ lower notation matters. To identify your groupset, look for the model code printed on the rear derailleur cage, such as R9100, R8000, the SRAM model name, or the E1 \/ XPLR designation. The full\u00a0<a>ceramic pulley wheel range<\/a>\u00a0is organized by these groupset codes so you can select the exact matching set.<\/p><p><a href=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1.jpg\"><img decoding=\"async\" class=\"alignnone size-large wp-image-63073\" src=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-1024x683.jpg\" alt=\"\" width=\"1024\" height=\"683\" srcset=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-1024x683.jpg 1024w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-300x200.jpg 300w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-768x512.jpg 768w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-1536x1024.jpg 1536w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-18x12.jpg 18w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1-600x400.jpg 600w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/07\/CyclingCeramic-pulley-wheels-guide-1.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p><\/section><section id=\"section-2\"><h2>Upper vs Lower Pulley: What the Tooth Count Notation Means<\/h2><p>A rear derailleur carries two pulley wheels, and they do different jobs. Reading the size as a pair, upper then lower, tells you exactly what to order.\u00a0<strong>The upper pulley is the guide pulley.<\/strong>\u00a0It sits closest to the cassette and is sometimes marked with a\u00a0<strong>G<\/strong>. Its job is to steer the chain laterally onto the correct sprocket during a shift. To do that cleanly it is built with a small amount of side-to-side float, which is why guide and tension pulleys are not always identical even within the same derailleur.\u00a0<strong>The lower pulley is the tension or idler pulley.<\/strong>\u00a0It sits at the bottom of the cage and keeps the chain under constant tension as the derailleur takes up slack across the gear range. It runs in a straighter line and prioritizes low friction over lateral guidance. When a size is written as\u00a0<strong>11T \/ 11T<\/strong>, both pulleys carry eleven teeth. When it is written as\u00a0<strong>12T \/ 14T<\/strong>, as on Campagnolo EKAR and SRAM RED E1, the upper guide pulley has twelve teeth and the lower tension pulley has fourteen. The 13-speed SRAM Red XPLR goes further still, pairing a 14T upper with a 16T lower. Getting the order right matters: fitting the larger pulley in the upper guide position, or vice versa, throws off chain wrap and shifting.<\/p><div class=\"callout\"><strong>Quick check before you order.<\/strong>\u00a0Confirm three things: the manufacturer (Shimano, SRAM, or Campagnolo), the derailleur generation code (for example R9200, RED E1, or XPLR 13-speed), and whether your groupset uses a matched pair or a split size like 12T \/ 14T or 14T \/ 16T. Those three details fully determine the correct pulley set.<\/div><\/section><section id=\"section-3\"><h2>Why Pulley Size Matters: Chain Wrap, Tension, and Shifting<\/h2><p>Tooth count is not cosmetic. The pulley size your derailleur was engineered around governs three things that directly affect how your drivetrain runs.\u00a0<strong>Chain wrap.<\/strong>\u00a0The number of teeth and the position of the guide pulley set how much of the chain engages the cassette and how the chain articulates through the cage. A pulley with the wrong tooth count changes the wrap angle and can leave the chain poorly seated.\u00a0<strong>Chain tension.<\/strong>\u00a0The lower tension pulley keeps the chain taut across every gear. If the pulley diameter is wrong for the cage, tension is either too slack, risking a dropped chain, or too tight, adding drag.\u00a0<strong>Shifting quality.<\/strong>\u00a0The upper guide pulley positions the chain for each shift. The correct tooth count keeps tooth engagement consistent so gear changes stay fast and precise. The general mechanical consequences of fitting the wrong size are well documented: hesitant or noisy shifting, accelerated chain and pulley wear, and in extreme cases a chain that drops off the cage. None of these are CyclingCeramic-specific failures; they are the standard outcome of a mismatched pulley on any derailleur. This is also why the right tooth count is the prerequisite for efficiency to translate into clean running. Independent Friction Facts testing recorded CyclingCeramic 11T pulleys at 0.039W of friction versus 1.175W for a stock Shimano Dura-Ace pair, a 97% reduction; the full breakdown lives in our\u00a0<a>ceramic versus aluminum pulley wheels comparison<\/a>.<\/p><\/section><section id=\"section-4\"><h2>Standard Replacement vs Oversized Cage Pulleys<\/h2><p><a href=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3.jpg\"><img decoding=\"async\" class=\"alignnone size-large wp-image-61676\" src=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-1024x683.jpg\" alt=\"\" width=\"1024\" height=\"683\" srcset=\"https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-1024x683.jpg 1024w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-300x200.jpg 300w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-768x512.jpg 768w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-1536x1024.jpg 1536w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-18x12.jpg 18w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3-600x400.jpg 600w, https:\/\/cyclingceramic.com\/wp-content\/uploads\/2026\/03\/Cycling_Ceramic-OSPW-Race-Special-Edition_Canyon-3.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p><p>One of the most common points of confusion is mixing up two different products. They are not the same purchase, and choosing between them changes which sizes apply.\u00a0<strong>Standard replacement pulleys<\/strong>\u00a0are direct swaps for the pulleys your derailleur shipped with. They keep the original tooth count, for example 11T \/ 11T on Shimano road or 12T \/ 14T on SRAM RED E1, and fit into the stock cage. This is what you want if your goal is to upgrade bearing quality, restore worn pulleys, or improve shifting feel without changing the derailleur geometry. Every size in the compatibility table above refers to these standard replacements.\u00a0<strong>Oversized cage systems (OSPW)<\/strong>\u00a0are a separate product that replaces the entire derailleur cage along with larger pulleys. CyclingCeramic oversized cages typically run a\u00a0<strong>14\/19T<\/strong>\u00a0layout, with dedicated versions engineered for road, gravel (including Shimano GRX \/ GRX Di2) and SRAM AXS. The larger pulleys reduce the chain articulation angle and cut additional friction, but because they change the cage geometry they are a different fitment, not a drop-in replacement for stock pulleys.<\/p><table><thead><tr><th>Aspect<\/th><th>Standard Replacement Pulleys<\/th><th>Oversized Cage System (OSPW)<\/th><\/tr><\/thead><tbody><tr><td><strong>What it replaces<\/strong><\/td><td>Pulley wheels only<\/td><td>Full derailleur cage + pulleys<\/td><\/tr><tr><td><strong>Tooth count<\/strong><\/td><td>Stock size (e.g. 11T \/ 11T, 12T \/ 14T)<\/td><td class=\"green\">Oversized, typically 14\/19T<\/td><\/tr><tr><td><strong>Fitment<\/strong><\/td><td class=\"green\">Direct swap<\/td><td>New cage, geometry changes<\/td><\/tr><tr><td><strong>Derailleur adjustment<\/strong><\/td><td>B-tension check advisable<\/td><td>Full B-tension + limit setup<\/td><\/tr><tr><td><strong>Best for<\/strong><\/td><td>Bearing upgrade, like-for-like<\/td><td>Maximum friction reduction<\/td><\/tr><\/tbody><\/table><p>If you simply want better, longer-lasting pulleys for your existing setup, the standard replacement in your groupset size is the right choice. The oversized cage is a separate, more involved upgrade for riders chasing the last fraction of a watt.<\/p><\/section><section id=\"section-5\"><h2>How CyclingCeramic Pulley Wheels Fit In<\/h2><p>Every CyclingCeramic pulley wheel is built to the correct stock tooth count for its target groupset, so the sizes in the table above are exact replacements, not approximations. The range covers the full spread of modern drivetrains: 11T for Shimano road and classic Campagnolo, 12T for 12-speed SRAM AXS and Campagnolo, 12\/14T for Campagnolo EKAR and SRAM RED E1, 14T for Shimano GRX\/XTR and SRAM XPLR\/MTB, a dedicated 14\/16T set for SRAM XPLR 13-speed, and a 14T set for Campagnolo Super Record 13-speed. The bodies are machined and run on Grade 3 silicon nitride (Si<sub>3<\/sub>N<sub>4<\/sub>) bearings, the finest ceramic grade available, and the whole range is\u00a0<strong>handmade in France<\/strong>\u00a0and backed by a\u00a0<strong>4-year warranty<\/strong>, well above the typical one-year cover on stock components. For a like-for-like replacement, fitting is usually a direct swap: remove the original pulley bolts, transfer the new pulleys in the correct upper and lower positions, and reassemble. Because pulley orientation and B-tension affect shifting, a quick check of the B-tension screw afterwards is sensible, and it is essential if you move to an oversized cage. Step-by-step fitment notes and groupset-specific guidance are on the\u00a0<a>derailleur pulley support page<\/a>. A note on the very latest hardware. For the newest 12- and 13-speed electronic groupsets, including SRAM RED E1, SRAM Red XPLR AXS 13-speed, Campagnolo Super Record Wireless and the current wireless Shimano Di2, pulley fitment differs from earlier models. Rather than assume a size, check the compatibility selector on the\u00a0<a>pulley wheel product page<\/a>\u00a0or contact the team through the\u00a0<a>pulley support page<\/a>\u00a0for a confirmed match.<\/p><\/section><section id=\"section-faq\" class=\"faq-section\"><h2>Frequently Asked Questions<\/h2><div><h3>What size pulley wheels do I need for Shimano?<\/h3><div>Most modern Shimano road groupsets use 11T upper and 11T lower pulley wheels. This applies to Dura-Ace R9100 (11-speed), Dura-Ace R9200 (12-speed), and Ultegra R8000 \/ R8100. The\u00a0<a>CyclingCeramic replacement pulleys<\/a>\u00a0for these groupsets are 11T \/ 11T. Shimano gravel and MTB groupsets such as GRX and XTR use larger 14T pulleys, so confirm your exact derailleur model before ordering. The safest method is to match your derailleur generation code, for example R9200 or R8100, to the compatibility selector on the product page.<\/div><\/div><div><h3>What size pulley wheels do I need for SRAM?<\/h3><div>It depends on the generation. SRAM Red and Force AXS 12-speed road groupsets of the first generation use 12T upper and 12T lower pulley wheels. The newest SRAM RED E1 uses a split 12T \/ 14T set, and the 13-speed SRAM Red XPLR AXS uses a 14T \/ 16T set. SRAM XPLR (12-speed) and Eagle MTB use 14T pulleys. SRAM uses a different bolt and cage specification from Shimano, so SRAM pulleys are not interchangeable with Shimano derailleurs even when the tooth count matches. Always match the exact SRAM generation, first-generation AXS, RED E1, or XPLR 13-speed, to the specific replacement set.<\/div><\/div><div><h3>Are Shimano and SRAM pulley wheels interchangeable?<\/h3><div>No. You should never mix pulley wheels between Shimano, SRAM, and Campagnolo. Even when the tooth count is identical, the bolt diameter, cage width, and pulley body offset differ between brands. The Shimano and Campagnolo bolt fit is similar, but SRAM uses its own specification. Fitting the wrong brand of pulley can cause poor chain alignment, noisy running, and unreliable shifting. Always match the pulley wheel to the manufacturer and generation of your rear derailleur.<\/div><\/div><div><h3>What is the difference between the upper and lower pulley wheel?<\/h3><div>The upper pulley sits closest to the cassette and is called the guide pulley, often marked with a G. It steers the chain onto the correct sprocket and needs a small amount of lateral float to allow clean shifting. The lower pulley is the tension or idler pulley, and it keeps the chain taut through the cage. On most road groupsets both pulleys share the same tooth count, for example 11T \/ 11T on Shimano, but several groupsets use a larger lower pulley: Campagnolo EKAR and SRAM RED E1 are written 12T \/ 14T, and the 13-speed SRAM Red XPLR is written 14T \/ 16T (upper \/ lower).<\/div><\/div><div><h3>What size pulley wheels do I need for SRAM Red XPLR 13-speed?<\/h3><div>The 13-speed SRAM Red XPLR AXS gravel groupset uses oversized pulley wheels, and the CyclingCeramic replacement is a 14T \/ 16T set (also compatible with SRAM T-Type \/ Eagle transmissions). This is different from both first-generation SRAM AXS (12T \/ 12T) and SRAM RED E1 road (12T \/ 14T), so confirm you are ordering the XPLR 13-speed set specifically. See the\u00a0<a>pulley wheel range<\/a>\u00a0for the exact set.<\/div><\/div><div><h3>Do I need to adjust my derailleur after fitting new pulley wheels?<\/h3><div>When you replace standard pulleys with new ones of the same tooth count, fitting is usually a direct swap and no major adjustment is required. It is still good practice to check the B-tension screw afterwards, since this sets the gap between the upper guide pulley and the cassette and controls shifting crispness. If you move to an oversized cage with larger pulleys, such as a 14\/19T road cage, the derailleur geometry changes and a full B-tension and limit check is needed. For groupset-specific fitment, see the\u00a0<a>CyclingCeramic derailleur pulley support page<\/a>.<\/div><\/div><\/section><section id=\"section-conclusion\"><h2>Conclusion<\/h2><p>Choosing the right pulley wheel size comes down to one rule and one table. The rule: match the brand and the exact generation of your rear derailleur, never mix Shimano, SRAM, and Campagnolo. The table: most Shimano road groupsets take\u00a0<strong>11T \/ 11T<\/strong>, first-generation SRAM Red and Force AXS take\u00a0<strong>12T \/ 12T<\/strong>, SRAM RED E1 takes\u00a0<strong>12T \/ 14T<\/strong>, SRAM Red XPLR 13-speed takes\u00a0<strong>14T \/ 16T<\/strong>, Campagnolo Record takes 11T \/ 11T, and Campagnolo EKAR takes 12T \/ 14T. Read the size as upper \/ lower, confirm whether you want a standard like-for-like replacement or a separate oversized cage system (typically 14\/19T), and a like-for-like fit is usually a direct swap with a quick B-tension check. When the size matches, a quality pulley delivers everything its bearings promise; when it does not, even the best bearing will shift poorly. Find your exact groupset in the\u00a0<a>CyclingCeramic pulley wheel range<\/a>, and if you are running the newest electronic groupset, SRAM RED E1, XPLR 13-speed or Campagnolo 13-speed, the\u00a0<a>derailleur pulley support page<\/a>\u00a0will point you to the right set. To understand what the upgrade actually does to drivetrain efficiency once it is fitted, the\u00a0<a>ceramic versus aluminum comparison<\/a>\u00a0covers the lab data in full.<\/p><\/section><\/section><\/article>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The short answer: most modern Shimano road groupsets use\u00a011T \/ 11T\u00a0pulley wheels, and the first generation of SRAM Red and [&hellip;]<\/p>\n","protected":false},"author":1939,"featured_media":62723,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ai_generated_summary":"","footnotes":""},"categories":[1479,264],"tags":[],"class_list":["post-62875","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","category-workshop"],"acf":[],"_links":{"self":[{"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/posts\/62875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/users\/1939"}],"replies":[{"embeddable":true,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/comments?post=62875"}],"version-history":[{"count":3,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/posts\/62875\/revisions"}],"predecessor-version":[{"id":63077,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/posts\/62875\/revisions\/63077"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/media\/62723"}],"wp:attachment":[{"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/media?parent=62875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/categories?post=62875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cyclingceramic.com\/fr\/wp-json\/wp\/v2\/tags?post=62875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}