The Surly Steamroller. More at home on the street than the velodrome the Steamroller takes you just about anywhere.Geometry is more similar to road than track; track crank compatible BB height is track legal100% Surly 4130 Chromoly steel frame and fork; double-butted main triangle; zero braze-onsFully brazed 1-1/8" threadless CroMoly fork includedFork and seatstay bridge drilled for standard mid-reach (47-57mm) brakes700c x 38mm maximum tire clearance on frame and forkFrame is ED Coated for increased life expectancy Rear Axle 10x1 Threaded x 120mm Brake Type Rim TT (Effective) 530 Fork Type Rigid Fork Material Steel Frame Material Steel Frame Type Rigid Front Axle 9x1 Threaded x 100mm Color Black Mfg Size 49 Platform Steamroller Wheel Size 700c Defined Color Black