Inspecting Wheel Bearings
Wheel bearing failure on track is dangerous. Inspect bearings annually (or any time you notice vague handling, grinding, or play in a wheel). The Rush SR uses sealed wheel bearing hub assemblies — the same unit at all four corners, bolting directly to the upright. These require no preload adjustment or re-greasing; when they wear out, the entire hub assembly is replaced.
The factory maintenance schedule calls for bearing replacement at every 4 years / ~160 hours.
Inspection — Lift Test
Safely lift and support the car with the wheel off the ground.
Grip the tire at 12 and 6 o'clock and try to rock it — there should be zero play.
Grip at 9 and 3 o'clock and repeat.
Any detectable play indicates a worn bearing assembly that must be replaced before the car goes back on track.
Inspection — Rotation Test
With the wheel off the ground, spin it by hand.
It should spin smoothly with no roughness, grinding, or uneven drag.
Any roughness or notchiness indicates a worn hub assembly.
Replacement
The sealed hub assembly bolts directly to the upright — remove the wheel, unbolt the hub from the upright, and fit the replacement. Replace the hub assembly (not just the bearing) — they are not user-serviceable internally.
Refer to torque specs for hub bolt torque values.
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