This is a 21.5 FBM Trails frame. The Steadfast frame is pure BMX and is made by hand at FBM's workshop in the USA. The frame is made from Supertherm 4130 tubing and has a post weld heat treated front triangle. The frame also has tapered stays, a brazed on built in seat clamp, an externally butted seat tube and is longer and higher than most - For the trails! Specs: BB Height: 11.8" BB Type: Mid Brakes: With brake mounts Head Tube angle: 74° Headset type: Integrated Rear end length: 13.87" Seat tube angle: 71* Weight: 4.85lbs 21.5 Only!