Spidertrax 40 Spline Ultimate Unit Bearing 6 on 6-1/2" x 5/8" Studs King of Hammers each aluminum seal housing is

each aluminum seal housing is designed to be securely locked inside the Spider 9 housing

with a top layer of memory foam to help the cushion form to your body

Larger inner pinion bearing reduces gear deflection under high load

These are the link mounts that we typically use on the Bomber race cars

Spidertrax 40 Spline Ultimate Unit Bearing 6 on 6-1/2" x 5/8" Studs King of Hammers each aluminum seal housing isUltimate Unit Bearing 40 Spline 6 on 6 1 2" x 5 8" Studs Built 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