I own a P1 with Prodrive 18" alloys and it's now time to change the tyres. I've been running on Goodyear F1's size 225/35/18 but I find the ride very hard and there is alot of space under the wheel arch. I thought of putting the same size tyres back on, lowering the car and putting up with the bumps, but i don't really want to change the standard springs.
Shall I run higher profile tyres? If so, what size? and What is the ride and handling like?

 

The size to go for would be 215/45/18. Can't comment on the ride though.

 

as far as i no & presuming that woz correct size in 1st place, cant b arsed 2 check , but u cant change how much tyre u got 2 play with without toally fukin up yer speedo etc readings so if u want non lower profile then u need 17"ers or even less in reality Can swap with my 17"ers if u like
Si

 

What alloys you got scooby si and will they have brand new tyre's.

 

Especially on the classic scoob ie P1 you may find upping the tyre profile from 35 to 45 say will mean the tyre may rub the arches so becareful. Also if you lower the car this can have the same effect.

 

This is pretty good, dont know how accurate it is but it tells you the diameter diffs and how much your speedo will be out.

http://www.miata.net/garage/tirecalc.html

[Edited by chrisp - 12/14/2002 8:01:30 PM]

 

Thanks for your answers so far everyone relating to swan's answer will I be able to do what he said that is put on 215/45/18 when mine are *225*

 

Oops diddly tropsham. Ive had a few too many barley wines. hic hoc hiccup :confused; hippoc.......Blutes

 

99% certain 215/45/18 will rub the arches you may get way with 40s but they maybe close esp. when people in the back

 

215/35/18 is what you want..!!

Dan

 

215/35/18 is what I have

 

.

[Edited by JOE#P1 - 12/14/2002 9:50:47 PM]

 

Anybody with a comment on this issue.

 

err the ride is supposed to be hard, it was set up like that by those nice chaps at Prodrive. Doesn't mean it's not compliant though and I didn't find it a problem.

If you have a big gap between the arches then there is something wrong with your car. Mine had about an inch from memory. Take a look at an STI7, now there is a BIG gap.

What tyre pressures are you using ?

 

err 4psi there's got to be something wrong with my car russell.

I run 30psi



[Edited by JOE#P1 - 12/15/2002 1:32:29 AM]