Are these wheels/tyres an good for my car?

[MMT]

It's a 99 996 C4

Front 225 40 R18 - 8" x 18" ET 50
Rear 285 30 R18 - 10" x 18" ET 65

Is the rolling circumference close enough and are they likely to rub anywhere?

Thanks

[Orangecurry]

I believe so.

Here is your OE bible - anything close to this *should* work, but if you push the offset too far from OE then you may get rubbing. Remeber also that different makes of tyres do have different sidewall profiles which may add to the chances of rubbing.

http://www.944racing.de/wheelweights.php

Alternatively, do some maths using this excellent site:

http://www.carbibles.com/tyre_bible_pg4.html

Edited by Orangecurry on Monday 7th September 08:56

[MMT]

Thanks for your reply.
I have done a bit more digging and found some info in Total 911 magazine showing the 993 C4S and turbo both had this set up. My worry is if the rolling circumference is out too much, can it cause any diff issues - winding up?
The ET offset is correct for my car I believe. A closer combination would be 295 30 as far a rolling circumference. It's just whether there would be any rubbing on a C4.

[Orangecurry]

Yes the widebodied 993s had OE 285/30/18s at the back, but the shapes of the two cars are very different and tell you little about your 996.

Why don't you create a thread entitled:

'Do 285/30/18s fit on the back of a NB 996' or similar - you might get more real-owner replies.

Good luck.

[MMT]

Ok thanks I'll try that. 👍🏼

[Zoin]

My narrow-body 996.5 runs those exact tyre sizes. Never had any problems with rubbing.

[IknowJoseph]

I run those tyres on my narrow body 996, but my rear wheels are wider with a different offset to what you've mentioned so Fronts are identical size tyres on same size wheels.

[MMT]

Thanks for the replies.
My C4 currently has this set up, but they're winter tyres.

F 8" x 18" ET52 with 225 40
B 10" x 18" ET65 with 265 35

I've seen some wheels with half decent tyres for sale, but the back tyres are slightly bigger
at 285 30.

The 265 35 is 0.2"/0.8% bigger than the front.
The 285 30 is 0.4"/1.6% smaller than the front

The 285 is also 0.8" wider than the 265 too.

[DasChin]

I had that exact wheel and tyre size on my old narrow body 3.4 996.

It had the gt3 style split rims as had gt3 body kit too.

You will be totally fine.

[MMT]

Great, thanks for your replies.