Ty Morrow. Full 4130 chromoly construction with heat-treated integrated head tube, heat-treated Mid bottom bracket shell, gusseted top and down tube, externally machined seat tube with integrated clamp, ovalized down tube, tapered seat stays, dent resistant ovalized single bend chain stays and 5mm thick dropouts. Available in brakeless or with removable seatstay brake mounts. 
75* heat tube 
71* seat tube 
13.5″ chain stays 
11.625″ BB height