Shimano 12-Speed Road Ceramitech OS Pulley Set (12T upper/14T lower, set of 2)


Size Guide


  • Rock solid chain control means crisper shifts while Ceramitech bearings channel all your hard work to the ground.

    This Shimano ceramic pulley set features a 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.

    This Shimano ceramic pulley set blows 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 pulleys are specifically designed to FIT Shimano 12-speed road drive trains.

    The 12-speed Dura-Ace pulleys are ONLY compatible with:

    Dura-Ace RD-R9250 rear derailleur

    You will choose our DURA-ACE option.

    The 12-speed Ultegra/105 pulleys are compatible with:

    Ultegra RD-R8150 rear derailleur

    105 RD-R7150 rear derailleur

    You will choose our Ultegra/105 option.

    If you are running a 12-Speed chain on any of the following 11-Speed groups:

    RX810 & RX812-series cages

    RX815 & RX817-series cages

    R7000-series 105 SS & GS cages

    R8000-series Ultegra GS long cage only (mechanical)

    R8050-series Ultegra SS & GS cages (Di2)

    R9100-series Dura Ace (mechanical and Di2)

    You will choose our Ultegra/105 option.

    It's a mystery to us why major manufacturers ignore bicycle 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 with this Shimano pulley set that includes 12T/14T road bike pulleys.


    BBInfinite Ceramitech pulleys have a 1-Year warranty.



Customer Reviews

Based on 1 review Write a review
Bottom Bracket Selection Guide