Improtant: Measure from the bottom neck bearing down to the axle. As a reference, on this springer that measurement is 22", considered as the stock size.)
Features:
The reinforced top and bottom trees reduce flex and improve handling.
Heavy duty, one piece forged rear legs.
Improved durability for front rear legs.
Precision fit bronze rocker bushings for long life.
TIG welded alloy steel construction for strength and durability
9.5" between rockers where the axle goes between.

Fitment:
These are designed to fit most Harley Davidson Big Twins from 1949-Present and 1982-2003 Sportsters with 1" neck bearings and 3/4" Axle.
Includes a 1" diameter steering stem, 3/4" diameter axle, and wheel spacers.
Includes 3/4" axle and wheel spacers for 1984-1999 Harley Wide Glide wheels.They work with a 11.5" Harley brake rotor (1984-1999), and Springer type brake calipers.
To install on 1952-1981 Sportsters, a 7/8" - 1" neck cup conversion kit will be needed.
You can run other wheels (Narrow Glide, etc) but you will need to cut your own wheel spacers in order to do so.
The top tree accepts 1/2"-20 fine thread risers and the riser spacing is 4.75" center to center (same as OEM Harley Springers) keep that in mind when purchasing handlebars.
If you want to run Harley OEM style handlebars with 3.5" riser spacing you will need to purchase a riser adapter kit.
Not fit :
2004 & newer Harley Sportsters because of turning radius and fork lock interference
Dyna wide glide or narrow glide.
XS650, unless you purchase a conversion kit.
Vintage Triumph Models unless you purchase a conversion kit.