There is a fairly simple formula to calculate the rolling radius of tyre
and wheel. That sorts out the height issue. As far as the width of the
tyre goes, that depends upon how much space there is. There is no fixed
formula, but very often the standard car has enough space for the wheels
fitted to the top of the range model. If you are willing to cut off
bodywork and/or fit wheel arch extensions, you can go further.
There are other downsides, though;
Making the tyres too wide will cause problems with aquaplaning. Fitting
bigger wheels and lower profile tyres will make the ride harsher.
Although the limits of grip on wide low profile tyres are higher than
those of narrow, higher profile tyres, they may start to slide less
progressively, giving the driver less time to react. Your insurance
company may not like it. You may make the car behave less like a
Peugeot; the only area in which Pugs are truly and inarguably the best
cars in the world is their handling; nothing else in their market sector
comes near.
I could fit 195/50/15s to my car, instead of the 185/55/a5s it has now,
but it has enough grip in the dry, and the wider tyres wouldn't help in
the wet. I'd do better to change brands, which I will do when I get the
chance. The Dunlop SP sports the previous owner fitted are, well, poo.
Anyway, for a good synopsis, see
http://www.geocities.com/MotorCity/2195/tyre_bible.html
Chris Longhurst (the site owner) used to contribute to a newsgroup that
I subscribed to, and he's a good bloke. Even if he does own an Audi
rather than a peugeot.
-- Steve Walker_____________________________________________________ To unsubscribe, send email to PEUGEOT-REQUEST@PADUI.ORG with the word UNSUBSCRIBE in the message body. Leave the subject line blank. _____________________________________________________