Diamondback Bicycles 2015 Atroz Comp Full Suspension Complete Mountain Bike Hand built 4-inch travel 6061 t-6 aluminum alloy full suspension frame with rock shod monarch r is super strong Sram 10-speed drivetrain provides wide range of gears Tektro Gemini hydraulic disc brakes deliver plenty of stopping power in all conditions 27.5" Wheels roll well over obstacles and offer quick handling Sr sun tour XCR 120mm fork has hydraulic lock out