22mm TOTAL WIDTH 24 Tooth Sprocket (33 spline) chain conversion or wider tires for 5 Speed Softail 86-05 & FXR 84-94 XL & BUELL 91-06
Generally for 150 tire use, measures 22mm overall width... from inner mounting face to outer sprocket teeth outer... comes with .200" width rear wheel spacer
Working out your requirements....measure with a straight edge onto your outer face of the rear sprocket, already fitted on your wheel ( with clearance for your chain to tire ) centered and squared in your frame. Measure the distance from from the same edge in contact with the rear sprocket outer face, to the exposed transmission mainshaft bearing spacer.
Supplier states up to a 150mm tire use on 5 speed Big Twins ( stock ratio being 2.1875 : 1 ... so... this with a 70 Tooth rear = 2.125 : 1 or a 48T = 2.00 : 1 Softail models 1986 up would require 73-85 rear sprockets & FXR models need 85-94.