Diamondback Bicycles 2015 Hook Hard Tail Complete Mountain Bike Reliable hand built 6061-t6 aluminum alloy hard tail frame w/ progressive, low slung geometry for trail riding performance Rockshox 120mm suspension fork tackles trail obstacles Sram 1x10-speed drivetrain efficiently eliminates front shifting Db sl-7 double wall 27.5" Wheels Scram 1x8 gearing for simplicity and smooth shifting