BBInfinite's Shimano 12T pulleys have rock solid chain control, meaning crisper shifts while Ceramitech bearings channel all your hard work to the ground.
Each road bike pulley 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.
Ceramitech 12T Shimano Road bike derailleur pulleys blow the stock pulleys away when it comes to spin, and the oversize diameter reduces chain pin working angles to eliminate every bit of friction possible.
These Shimano road derailleur pulleys are compatible with:
ULTEGRA 6800 (All Di2 and mechanical)
ULTEGRA R8000 (All Di2 and mechanical)
DURA ACE 9000 (mid and long cage only. Will not fit short cages)
DURA ACE R9100-series (All Di2 and mechanical)
105 R7000 (mechanical)
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 bicycle derailleur pulleys.
BBInfinite 12T Ceramitech pulleys have a 1-Year warranty.