Diamondback Bicycles 2015 Trace Complete Dual Sport Bike 60661-T6 aluminum alloy construction with forged dropouts for durability High tensile steel fork for confident steering Tektro disc brakes deliver stopping power in all conditions Dual sport 700c tires roll fast and smooth on pavement with traction for trail use Shimano 7-speed shifters and derailleurs provides wide range of gears