State Bicycle Fixed Gear/Fixie Machined Track Wheels (Front and Rear) 700c track wheels for fixed gear and single speed bikes. Lightweight aluminum alloy 43mm rim depth, 105mm and 125mm spacing. Quando 32H x 14G hubs Flip / Flop rear hub allows for the use of both fixed gear and single-speed freewheel cogs 16 Tooth Fixed Cog and Lockring INCLUDED Wheels feature a high-quality nylon rim strip to protect tubes from punctures