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Old 06-27-2009, 08:35 PM   #1
SurfWagon
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Default 235/40/18 on 18x7.5.....bad juju?

I'm looking to put an autoX setup together and had originally wished to go with 17x8 kosei k1 ts and nitto nt05, but just found a decent deal on 18x7.5s. Is this sidewall going to fair OK, or am I asking for trouble. Nitto recomends 8.0 as the minimum, but I saw on the 17x7.5 thread that people were running 235s OK.

Sidewall would be 3.7 in.

Also, the wheels are powdercoated black, but the wife hates black wheels on black cars....and it's her car, so she gets final decision. Anyone ever remove powdercoating?

Update: OK, so I've been tempted by running 255/40 NT05s on a 17x8 rim. That is 10.12" with a 4" sidewall. Nitto says it needs a 8.5" rim, but I'd be OK with a little bulge.
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Last edited by SurfWagon; 07-01-2009 at 09:44 PM.
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Old 06-27-2009, 10:20 PM   #2
blacksrturbo
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I would just powdercoat a new color on the wheel. Removing it will take a few years of sanding your wheels down...
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Old 06-27-2009, 11:53 PM   #3
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Quote:
Originally Posted by blacksrturbo View Post
I would just powdercoat a new color on the wheel. Removing it will take a few years of sanding your wheels down...
Power Coat can be chemically removed.... it just takes forever

it just softens up and kinda peels away like a Brake Kleen soaked latex glove
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Old 06-28-2009, 01:23 AM   #4
SurfWagon
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ok....looks like we can strip the wheels.

Ideas on the tire size?
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Old 06-28-2009, 11:22 AM   #5
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Had another change of heart. Found new MB weapons 17x8 for$500 that I could put 255/40/17. Id rather have the extra width...plus the wheels are only 17 lbs.
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Old 06-28-2009, 10:31 PM   #6
SurfWagon
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In the autoX wide tire superthread it states that 255/40 are no problem on 8" rims, but on the tire&wheel forums it makes it out to be a no-no. I understand it'll bulge a bit and that the contact patch will not be as great...but I'd take what I can get with such a cheap/lightweight rim.
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Old 06-29-2009, 01:23 PM   #7
mosc
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35 sidewall is generally 0-20% (wider tire than rim). 235 on a 7.5" is 23.4%. Not too terribly out of spec buy yeah, it's a little bit big.
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Old 07-01-2009, 09:46 PM   #8
SurfWagon
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Any autoX guys input?
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Old 07-01-2009, 09:50 PM   #9
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Quote:
Originally Posted by SurfWagon View Post
Had another change of heart. Found new MB weapons 17x8 for$500 that I could put 255/40/17. Id rather have the extra width...plus the wheels are only 17 lbs.
Double check that weight. I'm almost positive that those wheels in that size weight ~20 lbs or more. They are great looking wheels and are very well received by Subie owners...just want you to make sure you know what you're getting.

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Old 07-01-2009, 11:11 PM   #10
SurfWagon
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You're right. I don't know where I got that information from....
For $500 shipped might be worth it still. Man I thought I had some cheap lightweight wheels!
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