Diamondback Bicycles 2015 Sortie 1.0 Full Suspension Complete Mountain Bike Hand built 125mm full suspension 6061-t6 weapons grade aluminum frame is lightweight and durable Specially formed and butted tubes, and under arch seat stay bridge optimize strength to weight Knuckle box technology and fox float CTD suspension round off trail impacts Fox float CTD 29" air 130mm fork absorbs rough terrain with ease Shimano 9-speed drivetrain and hydraulic disc brakes deliver durable performance