Hi

Me again

I have been advised by more than one source that if I change my tyres from Conti Sport Compact 2s (which are apparently quite firm/noisy) to Dunlop SP9000 with a slightly higher profile (which are apparently quite soft/quiet) that the ride is much better?? Will this affect my warranty or cause any undue DSC problems.

 

I can't see how it would affect your warranty, but if you're going from RFTs to non-RFTs you'll see a big improvement in ride quality and noise. Tramlining will disappear too. A change in tyre aspect ratio will affect your speedo and odometer accuracy, because you're changing the radius of the wheel/tyre combo; although I'm not sure if that can be corrected with the car's on-board software. Why do you want to change the profile of the tyre? There are loads of good makes available with the same ratio as the standard fitment. I'm guessing that going from an RFT to a taller non-RFT set-up is also likely to make the handling a lot sloppier than you've been used to.

 

Thanks for reply.
They are actually NON R/Fs at present, but low profile and seem hard. So it will still be NON R/Fs in the Dunlop range, but next size up on the wall size (i.e 30 and 35, will now be 35 and 40) - good point about the mileage though? how do I find out about this, or will it be much diff?