Revolt Pro Cassette is our finest weapon to spin in the center of your rear wheel. We bring the same Q-Lai drive transmission technology which was successfully launched in single speed Revolt Pro hub in 2012 into a whole family of MTB rear cassette hubs. 6 big pawls located in the body plus 5 top quality sealed bearings, alu 7075 cassette body and push-in cones, hard anodized alu 7075 axle and perfect sealing secured by a set of o-rings and lip seals.