SpeedRamp technology delivers faster, quieter shifting | Thicker chromoly steel cogs from 11t to 28t provide a 500% durability increase over hi-tensile steel while the aluminum spider, 42t cog and 50t cog offer valuable weight savings | Replaceable small cogs extend service life | Nickel plated satin finish results in less visible wear | Compatible with Advent MX only | Compatible with XD driver hub bodies | Rated for E-bikes
UPC: 4710495438733