Old Sport Steel Bike Frame embodies the spirit of classic boardtracker designs with a high frame geometry yet a low riding position that offers cool ergonomics. Crafted from plain, unpainted steel, this frame supports rim sizes 24”, 26”, and 28” and offers US/BMX or optional BSA thread support couplers. It features a 1⅛” head tube with a standard length of 120 mm and fits a 28.6 mm seatpost clamp sized at 31.8 mm. Both disc brakes (available on order) and coaster brakes are supported. Customizable dimensions include an 80 cm head tube to seatpost length and a 65 cm seatpost to bottom bracket shell length, allowing you to tailor the frame for a perfect fit. This handmade steel frame combines timeless design with modern functionality for an outstanding custom bike experience.