Kogel Bearings 12/14T Oversized Pulley Set Shim R9100, Cross - Blk

model: 12/14T Oversized for Shim R9100 Cross,compatible: DA R9100, Ultegra R8000, 105 R7000,seal: cross,color: black/blue,A fresh look at pulley design maximizing pulley size and improving pedaling performance for any derailleur,Redesigned shape of the pulley teeth now give better chain retention and accurate shifts every time,Updates to newest version include: Increased stiffness using A-Shaped pillars between the bearings and teeth, maximized tooth count for every derailleur helps deliver optimal drivetrain performance, and enhanced visual design achieves a more cohesive look across the different models,Road seal version runs with uber-efficient minimal contact seals to achieve the lowest friction,Cross seal versions are built for leaving the beaten path, offering the best durability, regardless of the weather conditions,Sold as pair