Diamondback Bicycles 2015 Trace Sport Complete Dual Sport Bike 60661-T6 aluminum alloy construction with forged dropouts for durability Suspension fork helps absorb bumps from rough pavement and trail surfaces Disc brakes deliver stopping power in all conditions Dual sport tires roll fast and smooth on pavement with traction for trail use Shimano 8-speed shifters and derailleurs provides wide range of gears