RAW STEEL MTB FRAME NEW / SHIPS IN 24HRS SPECIFICATIONS: Frame material: High Tensile Steel Wheel compatibility: 26″ Brake compatibility: Rim Brake Fork compatibility: 1 1/8″ steer tube Seat post compatibility: 29.0mm (Seat post clamp bolt is NOT included) Front derailleur compatibility: Top Pull/Clamp-on (31.8mm seat tube diameter) Bottom bracket shell: 70mm ITALIAN threaded Compatible Crank: Any crank compatible with 70mm ITALIAN bottom brackets Headset: see below Includes frame only Frame Weight: 3020g Color: Grey (unpainted) Condition: New GEOMETRY: Top Tube: 21.5″ (actual, center of headtube to center of seat tube) Seat Tube: 19″ (Center of BB to top of seat tube) Head Tube: 3.75″ Head Tube Diameter: 33.75mm/38mm inner/outer COMPATIBILITY NOTES: Hub: Quick release (10mm) x 135mm There are three styles of headsets on the market, and variations/hybrids within those three. This is compatible with external style headsets where cups press into the headtube, leaving the part that holds the bearing external to the head tube. Compatible headsets will have the pressfit diameter portion of said cups roughly equal to the inner diameter of the headtube listed above. The bottom bracket is ITALIAN. It is not compatible with English threaded bottom brackets. While rarer than their English counterparts, they can still be found from a number of retailers, online or physical. Just none are available from us. Crank compatibility will rely upon what you eventually use as a bottom bracket. It is not something we can recommend for you, or determine compatibility for you. It is ultimately up to the buyer to determine bottom bracket and crankset compatibility Below is a video on how to get a professional looking paint job from a spray can. Featuring our very own John The Bike Guy.