Quote:
Originally Posted by DaveNP
If a new tyre has 8mm of tread and you wear it down to 2mm that's more than 1,5% difference in the overall diameter of the tyre, the tyre is also subject to squashing where it touches the road so the effective rolling radius (diameter) is not the same as the theoretical diameter, putting 4adults and a load of luggage in the car will squash the tyre more can also give a small percentage difference in the rolling radius. So if you're OK with the small speedo difference 1.5 to 3.5% difference wouldn't be a problem in my opinion.
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Damn, didn't even think about tread difference like that
. Thanks