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Do I need to change both tyres if I get a puncture on one?

I have just had to replace a rear runflat tyre due to having had a puncture on my BMW 420i Convertible which had only done 8,000 miles, so I now have a new rear tyre and one that has about 4mm of tread . Do I need to bite the bullet and replace the other tyre, or am I okay with two tyres of different tread depth on the same axle?

Asked on 11 December 2023 by william smitham

Answered by David Ross
BMW recommends that there is a difference of no more than 2mm between tread depths on the same axle, so if you fit a new tyre on one side we would expect the difference to be 3 or 4mm. You could ignore this advice, but an alternative would be to get two new tyres but keep the older tyre as a back up in case of another puncture.

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