Blackspire SUPERPRO MTB CHAINRINGS 9/10SP 96/64BCD (SHIMANO COMPACT 40T)

- Premium best-of-the-best replacement chairings for your Shimano compact triple 40-30-22T chainset using a 96/64BCD - CNC machined from T6 heat-treated, super-strong AL7075 right here in Canada - Middle and outer chainrings are cut from thick 0.190" material and granny chainrings from 0.160" - For use with Shimano triple chainsets utilizing a 96/64BCD with 9/10sp drivetrain - Includes modified shift gates and special profiles to enhance shifting speed and smoothness - Middle and outer chainrings include strategically placed stainless steel pins to further enhance pick-up and shifting speed