Paughco Big Twin Rigid Frames 26AK AXLE RR F/PAUGH FRMS Made with 11/8" down tubes (.125" wall thickness) and 11/2" backbone (.188" wall thickness) Choice of Straight Leg or the timeless Wishbone frame style, both with OEM-style neck Both frames have a 30 Degree neck rake, 0" backbone stretch, and 0" downtube stretch Standard-width rear section accepts 130-series tire, and includes a Paughco #218A chromed steel transmission mounting plate Compatible with Twin Cam "A" and Evolution Big Twin motors, 86-99 Soft ail 5/6-speed transmissions and 11/2 drive belt