The Definitive Cassette is the most advanced hub that Shadow has produced to date. With 120 points of engagement, the Definitive Cassette features a 3 pawl engagement system that uses 4 notches on each pawl for almost instant power transfer. The sleek and low profile hub shell is CNC'd from 6061-T6 aluminum with precision bearings, 7075 aluminum hardware, and printed logos. Low drag, high engagement with minimal pedal gap and it sounds like a hive of buzzin’ bees. 14mm hollow chromoly male axle with 6mm allen broaches. 36 hole. 

Weight: 21.16 oz