Origin-8's Track Attack 42mm Fixie Wheelset comes in a rainbow of colors, from the subdued to the bold, so you'll know your ride is the sharpest on the block. But, they're not just a pretty face. They feature 42mm deep aluminum rims, sealed cartridge bearings and reliable DT Swiss spokes to roll strong and sure over less-than-ideal surfaces. And, they come with a flip-flop rear hub so you can choose between fixed and freewheeling!