Retrospec Mantra Fixie Bicycle with Sealed Bearing Hubs Fixed-gear commuter bike with sealed bearing hubs, integrated seat clamp, platform pedals, water bottle mounts, and kick stand mount Fixie bike with Super Deep-V rims and a flip-flop hub so you can ride fixed-gear or single-speed on a freewheel Comes standard with Retrospec FGFS straps and reflectors Hand-built and tig-welded UrbanComfort frame is perfect for commuting to work, cruising on the beach, competing in an alley cat race, and everything in between Equipped with Kenda Kwest tires, the perfect commuter tire designed with smooth rounded tread with large water dispersion grooves