Problem Solvers Eccentric Bottom Bracket Shim - 57mm MFPN=F9954 N11 chainrings are compatible with

N11 chainrings are compatible with all 10 speed drivetrains and compatible with FSA SRAM and Shimano 11 speed drivetrains Ring Position/Type Outer Tooth Count 50 Drivetrain Speeds 10 Chainring BCD 120 Color Black Defined Color Black

5 mm width at the base that won't dig into your freehub body

Mounts in minutes with the wrench that is included

customers constantly tell us how much they love them

5" Tire Bead Wire Labeled Size 27 x 1

Problem Solvers Eccentric Bottom Bracket Shim - 57mm MFPN=F9954 N11 chainrings are compatible withThese handy Problem Solvers Eccentric Bottom Bracket Shims allow you to fit your existing Eccentric Bottom Bracket into BB shells with inner diameters of 55mm or 57mm. Anodized black 6061 Aluminum Size 57Mm