Kraft Tech Bobber Style Rigid frame for Wide Tire Big Twin, 30 degree rake, 0 downtube stretch. Additional clearance built into backbone for Evolution style engine with up to .200 inch taller cylinder/head length. Accepts 4 or 5 speed transmissions. Chain or belt final drive. Required components include chain or belt final drive, Softail 1986-1999 rear wheel hub, FL, FX 1973-1983 chain drive rear hub use with polished pulley spacer (1.090 inches thick) kit. Removable type fork head cups, axle adjuster bolts, Softail 1987-1999 and Flatside Fat Bob gas tanks and mounts as well as Softail style oil tank and mounts. Requires Softail 1987-1999 rear brake caliper and mount.