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Old 05-19-2013, 07:32 PM   #1
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Fitting some new wheels

So JD is going to smack me for posting another wheel offset thread, but I want to validate my thoughts on some SSR GT3 wheels that I'm considering.

Here's the breakdown:
  • 18X8 ET49
  • 18X10 ET62

Seems like the fronts will fit great with no spacers - Bosxtaboy has those fronts. It sounds like rears would need maybe 15 mm spacers.

The wheels are available with tires, which are the following sizes:
  • 235/40/18
  • 265/40/18

Can anyone comment on these wheels/offsets/tire sizes on the stock suspension? I'm especially unsure on the tires.

Thanks in advance!

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Old 05-19-2013, 08:30 PM   #2
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Wheels & Tires should be fine on stock suspension providing your Boxster is 1998+ (reinforced chassis for 18+ wheels) You would need spacers in the rear, 15mm would be a good choice.

Disregard if you have 98+ Boxster

"TSB #4407, dated March 4, 1997: " Eighteen inch wheels are not approved for use on Boxsters. Use of eighteen inch wheels on Boxsters under severe conditions may result in structural failures of the body and/or suspension"
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Old 05-20-2013, 05:24 AM   #3
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Quote:
Originally Posted by Tieniber View Post
So JD is going to smack me for posting another wheel offset thread, but I want to validate my thoughts on some SSR GT3 wheels that I'm considering.

Here's the breakdown:
  • 18X8 ET49
  • 18X10 ET62

Seems like the fronts will fit great with no spacers - Bosxtaboy has those fronts. It sounds like rears would need maybe 15 mm spacers.

The wheels are available with tires, which are the following sizes:
  • 235/40/18
  • 265/40/18

Can anyone comment on these wheels/offsets/tire sizes on the stock suspension? I'm especially unsure on the tires.

Thanks in advance!

It's only when someone raises the issue of 11 inch wheels, does my jumpsuit get in a frazzle. Anyway, the fronts will fit ok, but +49 with an 8 inch wheel may or may not give you the aggressive stance that you're looking for. The rear offset is definitely way too high. Your thoughts about using a 15mm spacer are on target. As far as the tires are concerned. IMO, 235/275 would provide a better balance than 235/265. Regardless, the aspect ratio on the rear tires is off. It should be 35 not 40.

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