These kits are designed to provide extra belt to lower swingarm tube clearance. This extra clearance may be needed on some Softail models when they are converted from the stock swing-arm to an extra wide swingarm and the belt is marking the lower swingarm tube. Available for 1985 thru 1993, 1993 thru 1999 and all 2000 thru 2005 Softail as well as 2006 FLST, FLSTC, FLSTF, FLSTN, FLSTSC and FXSTD. All kits are available with stock, 3/4" (19mm) and 1" (25mm) off-set in the front pulley. Kit has 29 tooth front pulley, 65 tooth rear pulley. Rear pulley is designed for use with1 1/8" belt. Stock rear ratio is 2.19, the 29 tooth with 65 tooth pulley will change this ratio by only 2 percent to a ratio of 2.24.