{"product_id":"enduro-bearings-xd15-ceramic-hybrid-pulley-wheels-for-shimano-dura-ace-12sp-black-green","title":"Enduro Bearings XD15 Ceramic-Hybrid Pulley Wheels for Shimano Dura Ace 12sp Black\/Green","description":"\u003cp\u003eEnduro Bearings XD15 Direct Line Pulley Wheels for Shimano Dura Ace 12sp Black\/Green represent a significant advancement in drivetrain performance and durability. Crafted from precision machined 500 AF Delrin®, these pulleys boast exceptional mechanical strength, natural lubricity, and outstanding resistance to moisture, chemicals, and UV exposure. This combination ensures a smooth, long-lasting operation that outperforms traditional aluminum or titanium pulley wheels by reducing friction and drag.\u003c\/p\u003e\n\n\u003cp\u003eAt the heart of these pulley wheels are the exclusive XD-15 Ceramic-Hybrid bearings, which integrate corrosion-proof, cryogenically treated nitrogen steel races with high-grade Silicon Nitride ceramic balls. This innovative design delivers superior shifting accuracy and longevity, supported by Kluber NBU52 grease that enhances smoothness over time while resisting washout. The unique bearing configuration—with tight clearance CN bearings in the upper pulley and loose clearance C4 bearings in the lower pulley—optimizes chain-line movement and maximizes drivetrain precision.\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a direct fit upgrade for SRAM 12-speed road and gravel derailleurs, this 12-tooth pulley set features 4mm upper and 5mm lower bolt-holes to ensure compatibility and easy installation. Manufactured in the USA, Enduro Bearings offers these high-performance components as part of their range, providing riders with reliable, precision-engineered parts that elevate their cycling experience.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEnhancing shifting precision and drivetrain smoothness through advanced ceramic-hybrid bearings\u003c\/li\u003e\n  \u003cli\u003eIncreasing pulley durability with high-strength, corrosion-resistant 500 AF Delrin® material\u003c\/li\u003e\n  \u003cli\u003eReducing friction and drag for a more efficient pedaling experience\u003c\/li\u003e\n  \u003cli\u003eDirect fit replacement for SRAM 12-speed road and gravel derailleurs, simplifying upgrades\u003c\/li\u003e\n  \u003cli\u003eProviding long-lasting performance even in harsh environmental conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse with derailleurs or drivetrains incompatible with 12-tooth pulley sizes or specific bolt-hole dimensions\u003c\/li\u003e\n  \u003cli\u003eApplications requiring non-standard pulley configurations or materials outside the Enduro Bearings range\u003c\/li\u003e\n  \u003cli\u003eRiders seeking pulley wheels without ceramic-hybrid bearing technology or advanced material benefits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAre these pulleys compatible with Shimano Dura Ace 12-speed derailleurs?\u003c\/strong\u003e\u003cbr\u003eYes, these Enduro Bearings XD15 pulley wheels are designed specifically to fit Shimano Dura Ace 12-speed derailleurs, offering a direct line upgrade for enhanced performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do ceramic-hybrid bearings improve shifting performance?\u003c\/strong\u003e\u003cbr\u003eThe ceramic-hybrid bearings combine corrosion-resistant steel races with Silicon Nitride ceramic balls, reducing friction and wear. This results in smoother, more precise shifting and longer bearing life compared to standard bearings.\u003c\/p\u003e","brand":"Enduro Bearings","offers":[{"title":"Black\/Green","offer_id":46201186189487,"sku":"BKCJ-0452","price":263.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/47327-pm.jpg?v=1768534310","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/enduro-bearings-xd15-ceramic-hybrid-pulley-wheels-for-shimano-dura-ace-12sp-black-green","provider":"Swinnerton Cycles","version":"1.0","type":"link"}