Shimano Cues Cassette CS-LG400 10 spd 11-39LINKGLIDE 10 Speed cassette is both light weight and durable LINKGLIDE cassettes are exceptionally durable, built to stand up to persistent daily wear providing enduring shift and pedalling performance for multi purpose bikes and high torque e bikes LINKGLIDE's cassette teeth have a substantially thicker base and a unique chamfer that drastically improves wear resistance in high torque applications LINKGLIDE sprockets have a computer designed tooth