OLizee trade; Fixed Gear Single Speed Fixie Road Track Bike 700X23C Colored Tires Use: Road bicycles, fixed gear. Size:700 * 23C. Weight: 1.32lb. Material: Specially high-strength nylon, thicker, more wearable, more anti-stab. Extra thick, long lasting tread for Urban use, great for skidding; Twin rails roll fast and quiet, inverted tread grips in a variety of conditions, wrap-around tread for consistent traction at hard angles; Anti-puncture center strip for flat protection; Dual compound tread with extra grippy shoulder tread.