Context: the shake that survives a tyre change
A common mobile-tyre call-out starts with a precise complaint: the steering wheel shakes at 60–70 mph, and the problem began or remained after new front tyres were fitted. Pressures, tread depth and visible sidewall damage can all check out. The remaining suspect is the wheel-and-tyre assembly itself. At 65 mph, a typical 16-inch assembly turns roughly 900 times per minute; any imbalance becomes a rotating force that grows with the square of speed. That is a balancing problem, not a tyre-compound problem.
Development: why a basic balance can miss the cause
A static balance checks one plane. A wide alloy and low-profile tyre can carry imbalance across two planes, producing a couple that only appears under rotation. On-site dynamic spin balancing measures both planes while the assembly turns. The practical difference is diagnostic: the fitter can see where weight is needed instead of guessing from a single-plane reading. For a mobile call-out, that reduces the risk of sending a vehicle away with a vibration still present.
The SpinBoss on-site workflow
For mobile fitting, spinboss is the relevant option when the complaint follows wheel speed rather than road surface. The workflow is straightforward but disciplined:
- Confirm the symptom. Note the exact speed band and whether the shake is in the steering wheel, seat or floor.
- Inspect before spinning. Check runout, tread, pressures and for missing or displaced weights.
- Spin-balance dynamically. Measure both planes, fit clip-on or stick-on weights as appropriate, and re-spin to confirm.
- Road-test the result. Recheck at the reported speed band; a clean balance should remove the speed-specific shake.
Result: a narrower diagnosis and fewer repeat visits
The result is not just a smoother drive. A confirmed dynamic balance separates wheel imbalance from tyre defect, bearing noise, brake judder or alignment pull. That matters on a mobile job because the fitter cannot keep the vehicle on a ramp for open-ended diagnosis. If the vibration remains after a verified spin balance, the next checks are targeted rather than repetitive. If it disappears, the customer avoids an unnecessary tyre replacement and the fitter avoids a second call-out for the same complaint.
What to tell the fitter before the visit
Give the speed range, wheel position, whether the vibration changed after the last tyre fit, and whether any wheel has been repaired or recently refinished. Those details let the fitter decide whether a dynamic spin balance is the first move. SpinBoss does not replace inspection; it makes the balancing step measurable. The value is in the sequence: verify the symptom, inspect the assembly, spin-balance in two planes, then road-test. That sequence is what turns a vague high-speed shake into a fixed, documented result.