This pulley set works with SGS (long) cages ONLY. If you have a GS cage, you should run the 12/12T's here instead.
Rock solid chain control means crisper shifts while Shimano ceramic pulleys channel all your hard work to the ground.
Each cog set features DELRIN® 510GR construction, a fiber reinforced polymer specially suited to high strength situations where resistance to deflection is paramount, such as every time you shift. The Ceramitech bearings are in-molded for absolute security and durability as well as ease of maintenance.
These 12T/14T pulleys blow the stock MTB pulleys away when it comes to spin, and the oversize diameter reduces chain pin working angles to eliminate every bit of friction possible.
The Shimano ceramic pulleys are compatible with:
ALL SHIMANO 10 AND 11 SPEED MOUNTAIN BIKE GROUP SETS, MECHANICAL AND Di2.
It's a mystery to us why major manufacturers ignore bottom bracket and derailleur pulley performance and continue to pump out under-performing products that sap wattage from riders who are working like mad to get faster. You have the BBInfinite bottom bracket with Ceramitechs already, and you've experienced the tremendous gains. It's time for another step forward toward your goal. Get the most out of your ride by riding Ceramic derailleur pulleys
BBInfinite 12T/14T pulleys have a 1-Year warranty.