What happens
Kerbed, split or bulging on the M25: is it safe to drive?
Damage on orbital cars is often discovered rather than felt: at a fuel stop in Thurrock, walking back to the car in a Rickmansworth car park, or after clipping a high kerb at the London Colney retail park by J22. A bubble on the sidewall means internal cords have snapped, a deep cut can reach the steel belts, and visible cord means the tyre is finished. None of these can be repaired, and the next stretch of orbital is the wrong place to test one.
Photograph the damage and read us the size off the sidewall. Our verdict follows honestly: whether the car must stay put, or whether a short, slow roll to a better part of the car park is reasonable. With a bulge the answer is nearly always to leave it alone. Off comes the damaged tyre, on goes a new one, balanced, and the rim gets a look for kerb scuffs and bends. You agree the cost by phone while the van is still loading at Brent Cross.
The same Brent Cross team also handles emergency tyre replacement on the M25 and 24 hour tyre repair on the M25, booked on the same call.