49cm Fits Riders 5"2 - 5"4, 52cm Fits Riders 5"4 - 5"8, 55cm fits Riders 5"8-6"0, 59cm fits Riders 6"0+ * Flip / Flop Hub - Easily Change Your Riding Style Between Fixed Gear or Single Speed * Durable, High Performance Hi-Tensile Steel Frame & Fork - Machine Tig-Welded * Machined Deep Dish 50mm Rims, Radius Front Brake for Prime Stopping Power * Superior Frame Geometry, and Large Profile Hubs Create a Insanely Smooth Ride