Diamondback Trace Street Hybrid Bike - 2016 Performance Exclusive 6061-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 3x7-speed Shifters and derailleurs provides wide range of gears