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Old 11-14-2007, 11:20 AM   #1
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Question 18" Lightweight Carrera rims with tire size?

Hi Folks,

I am about to finally order some 18" Lightweight Carrera rims on Wheel Dynamics and I want to make the best decision on tire sizes.

Gemballa North America recommends that for a '01 Boxster I should go with the following tire sizes for the 18" rims (8x18 ET50 mm front and 10x18 E47 mm rear):

Front: 225/40/18
Rear: 285/30/18

I am planning on putting Yokohama AVS ES 100s...

After doing some research on the forum, I found out that some people have had problems fitting a 285/30/18 tire on the above wheel rims while some have not (ie. the tire rubs the strut).

Apparently, the actual width of the tire can vary slightly depending on the tire brand. Has anybody had any problems with the above set-up for Yokohamas w/o using spacers?

Should I just go with

235/40/18 (frt) and 275/35/18 (rear), just to be conservative?

This Boxster has not been lowered and it would only be driven in the street.

Any feedback would be greatly appreciated...Thanks, guys...


'01 Triple Black Boxster 39.8 K

Last edited by calvani; 11-14-2007 at 01:01 PM. Reason: Missing info
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Old 11-16-2007, 06:19 PM   #2
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Most of us who run 18x10 rears do 265/35-18 and 225/40 front. Works well, you can fit a 285/30 with the right offset, but all you are doing is increasing understeer.

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Old 11-16-2007, 09:11 PM   #3
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Hi Patrick,

Thanks very much for the feedback. Yes, I will probably use such a set up. The Boxster is a beautifully balanced/neutral car and I don't think it is worth it to offset that balance just for looks (even if the car is only driven on the street). After all, the 285s will be also more expensive as well.



Last edited by calvani; 11-16-2007 at 09:13 PM.
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Old 11-17-2007, 06:37 AM   #4
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when I'm in the market for new tires, I was going to go for 285's but the cost to get a new one and to replace it, is the one who stop me.

Patrick, thanks for that info...I didn't know that now i know that I made the right decision for going on 265's on the rear

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