Measurement:
Outer diameter (1.65inch)
Inner diameter (1.14inch)
Overall height (1.7inch)
Max depth (1.57inch)
Max space for axle nuts(0.98inch)
Min space for axle nuts(0.82inch)

Fitment:
For 2007 and up Harley Davidson Softail (except Deuce, Springer & Rocker FXCWC, FXCW, FXDL, FLSTNSE, FXSBSE, FXST- Aus, and FXSTD)
For 2007 and up Harley Davidson Ultra Limited/Ultra Classic
For 2007 and up Harley Davidson Fat Boy
For 2007 and up Harley Davidson Heritage Softail
For 2007 and up Harley Davidson Road Glide
For 2008 and up Harley Davidson Road King
For 2008 and up Harley Davidson Street Glide
For 2008 and up Harley Davidson Dyna (except 2008 FXDSE)
For 2008 and up Harley Davidson Electra Glide
For 2008 and up Harley Davidson Breakout FXSB
For 2008 and up Harley Davidson Iron 883
For 2008 and up Harley Davidson Sportster 1200
For 2008 and up Harley Davidson Tri Glide
For 2008 and up Harley Davidson Ultra Trike
For 2002-2011 Harley Davidson V-Rod (except VRSCF and VRSCR)
For 2010 and up Harley Davidson Forty Eight

See what customers have said:
1. Mine is a 2006 Road King, I made a spacer ring on the left side to compensate for a smaller axle nut.
2. Fits my 2019 harley street glide like a glove.
3. I used copper tubing for the sleeves and notched them so that set screws would seat on axle nut.
4. Fits Harley street 750/500 without any problem.
5. Had to make a sleeve for the nut side of the axle so it would stay centered.
6. Fits well on my 2006 Ultra Classic.
7. Have to use some shim stock to get it fit tighter on the nut, looks good compared to a bare nut.
8. The ID is way over sized but the set screw do take up the slack but then the caps are not centered with the axle.