What problems will I get running '40 tyres

[Coups]

Originally Posted by thompn

Surely our speedos are not calibrated and can be up to 10% out either way, or is this just an old wifes tale and they are spot on?

You're quite right that our speedos are not calibrated and, like all production cars, can over read by upto 10%. They aren't legally allowed to under read though. I don't know about yours but mine certainly makes full use of the 10% over read. One of the most inaccurate speedos I've ever seen!


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[LotusLC]

Having had 40's fitted to my car since owning it, i have just purchased a set of 45's. The difference in driving the car is amazing, no more feeling like it has no suspension at all. I will never fit 40's ever again ...