Overview
The Spidertrax Offroad Ultimate Unit Bearing, part number FUBR55125835, is a racing unit bearing built for Ultra4 rock racers. It uses 5/8″-18 studs on a 5 on 5-1/2″ bolt circle and is designed specifically for Spidertrax 35 splined axle shafts.
Genuine Timken bearings and full Chromoly heat treated construction are part of the design. The fit type is Universal Fit, but no vehicle model or year is named, and the part is tied to the Spidertrax 35 shaft system.
Key features
- Genuine Timken bearings
- Full Chromoly heat treated construction
- Left and right hand threaded spindle nuts
- Fully integrated drive slug
- 5/8″-18 studs on a 5 on 5-1/2″ bolt circle
Unit bearing installation basics
A unit bearing carries the wheel and the load on the axle, so the mounting face and studs must be clean and undamaged before assembly. Check the spline engagement with the axle shaft and make sure the drive slug seats fully. A bearing that sits cocked on the hub can wear quickly and make noise under load.
Spindle nuts are often the cause of trouble when they are installed on the wrong side or are not fully tightened. Use the torque specification from the service information for your axle, and recheck the nut after the first few trail runs. Keep the bearing lubricated and inspect the seals whenever the hub is off.
- Clean the hub face and studs before mounting
- Confirm the spline engagement with the axle shaft
- Recheck spindle nut torque after initial use
Specifications
| Brand | Spidertrax Offroad |
|---|---|
| Part number | FUBR55125835 |
| UPC | 886542832420 |
| Bearings | Genuine Timken |
| Construction | Full Chromoly, heat treated |
| Studs | 5/8″-18 |
| Bolt circle | 5 on 5-1/2″ |
| Axle shaft fit | Spidertrax 35 splined axle shafts |
| Fit type | Universal Fit |
Vehicle fitment
No vehicle model or year is named for this bearing. It is designed for Spidertrax 35 splined axle shafts, so check the axle system and the 5 on 5-1/2″ bolt circle before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The right hand threaded spindle nut is intended for the right side of the vehicle (USA passenger side). Match the spindle nut to the correct side during assembly.
What’s included
The unit bearing with its integrated drive slug and a right hand threaded spindle nut.
Not included: Spidertrax 35 splined axle shafts, which the bearing is designed to fit.
