United Caveman V3 Frame - Black - 20.8" (Owen Clegg Graphics)The Caveman frame is made from full 4130 chromoly tubing and features an integrated head tube top and down tube gussets a down tube that wraps around the bottom bracket with a wishbone mid bottom bracket a wider rear triangle with tapered seat and chain stays to fit 2. 40" tyres removable brake mounts 5mm thick dropouts and of course a removable steel bash guard that attaches to the bottom of the wrap around down tube. Top Tube Length 20. 8" Chainstay