Spidertrax 40 Spline Ultimate Unit Bearing 8 on 6-1/2" x 9/16" Studs winch in-turn making the splines much

in-turn making the splines much stronger

Yukon heavy duty pinion supports feature upgraded materials and a larger design than OEM to provide heavy duty strength in racing and off-road applications

With over 3 years of competition testing and more top place finishes than we can count

giving us the ability to provide both hole & slot patterns beyond the tolerance and capability of laser

using an anodizing process for double corrosion resistance

Spidertrax 40 Spline Ultimate Unit Bearing 8 on 6-1/2" x 9/16" Studs winch in-turn making the splines muchBuilt ground up for Ultra4 rock racers, the Spidertrax Ultimate Unit Bearing is truly the reinvention of the unit bearing itself. Genuine Timken bearings, full chromoly heat treated construction, left & right hand threaded spindle nuts, and a fully integrated drive slug makes the Ultimate Unit Bearing the only racing unit bearing of its kind. The Ultimate Unit Bearing, the last bearing you'll ever need. This Ultimate Unit Bearing uses 9 16" 18 studs