This is a Large 44 Bikes / Marauder. Set up for single speed, but can be set up for gears. Reach out to 44 Bikes and you can buy the new drop out assembly. Frame: Large / steel Fork: Enve rigid fork Seat post: Paul component polished Handle bar: Race face Grips: Ergonomic GA3 Head set: White Industries/ press fit Bottom bracket: White industries threaded Crankset: White industries / 172.5 Chainring: 34T Chain: SRAM 11 speed Saddle: WTB Brakes: Paul components Brake levers: Paul components Rotors: SRAM direct center lock Wheelset: WTB Hubs: industry nine true axle