Kogel Bearings 14/14T Hybrid Ceramic Pulley Set SRAM 12 Cross - Gold MFPN=803-03-308 Chainring Bolt Pattern: Shimano 4

Chainring Bolt Pattern: Shimano 4 Bolt 110BCD for Dura Ace 2X Chainrings (will not work with Ultegra)

Length x width: 249mm x 163mm

then try a Bronson

9" Rate (Lbs) 600 Color Black

Kogel Bearings 14/14T Hybrid Ceramic Pulley Set SRAM 12 Cross - Gold MFPN=803-03-308 Chainring Bolt Pattern: Shimano 4A 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