8L S3 replacement tyre sizes?

[gareth_oau]

I'm thinking about replacing my tyres.

Currently I have 225/45/17, mounted on the factory Avus rims.

i'd love to get something a bit wider, and options are 235/45/17 or 245/40/17

both the options are about 1% larger, so the speedo accuracy isnt an issue.

however, I was wondering:

1/ will the wider tyres fit the rims without problems,
2/ would larger sizes cause any rubbing issues inside and/or outside,
3/ any problems with drivetrain/haldex etc.

Any opinions or experiences out there?

 

[fingermouse]

the S3 is slightly over rubbered as std so going wider may spoil the handling slightly. other than than you should be ok

 

[jcs356]

Have you priced up those sizes? 225/45/17 is quite a popular size on a lot of cars so demand is quite high and prices are lower; those other two aren't so you may find that they are a lot more expensive.

 

[gareth_oau]

yeah looked at pricing. In Oz, the 225/45/17 is not so popular and is actually more expensive than the others.

we must have a slightly different market to yours.

I also looked at www.tirerack.com to get comparitive pricing for say the goodyear F1 asymmetrics and there was only a US$20 spread across all 3, so I'm not really fussed about that

 

[MintyS3]

I run 225/40 on my 18x8. 235 might be a little wide on 7.5" wide wheels?

If you do go large though you might want to consider a thiner side wall. 235/40? 235/45 side wall will be larger than the side wall of the 225/45.

 

[gareth_oau]

yeah minty, alreay considered that. In my first post - the difference in rolling diameter between standard and the 2 options are quite minimal, and offset by normal tyre wear anyway.

Have a play here - good tyre size calculator

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