Diamondback Bicycles 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 SR Suntour XCM 120mm travel suspension fork tackles trail obstacles Sram 1x8 gearing for simplicity and smooth shifting Tektro Aries Mechanical Disc w/ 160mm Rotors DB SL-7 Double wall 27.5" wheels are sturdy enough to tackle the trail