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08-09-2011, 11:44 AM | #1 |
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Widest Front Tire on 18x8.5 et42?
Can anyone confirm what the widest tire I can run is, on a 18x8.5 et42 on a non-M, stock suspension? I'm willing to add negative camber if necessary, but am concerned that still might not address any strut side clearance issues. I do NOT want to run spacers up front.
Obviously 225/40 would work, but how about 255/35? |
08-09-2011, 12:17 PM | #2 |
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this topic sounds familiar...
by chance, have you measured your current strut-side clearance? it might be a good starting point for figuring this out.
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08-09-2011, 12:27 PM | #3 | |
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But I'm just getting too many varying opinions on the topic. Consensus seems camber will help with fender issues, but nobody can confirm strut side clearance w/o having to use a spacer. Will do that this weekend, but my concern is that on paper 255's might fit but on hard cornering or on the track, it may still rub... |
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08-09-2011, 01:53 PM | #4 |
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i didn't want to wait, so i'm using mine as a base line...
alright. maths. 8.0" et34 w/ 225/40 tread is producing ~25mm clearance from the strut to the inner edge of the tire on full left-hand lock (LF wheel was used for measuring). if i were to install your wheel, the inner edge would be 14mm closer to the strut. and an additional 15mm for a 225 --> 255 tread (255-225=30... 30/2=15). ~25mm definite clearance compared to 29mm loss = ~4mm deflection of the tire on the strut. and this is assuming the sidewall cross-section doesn't change. methinks a minimum of a 5mm spacer is required, maybe bigger. hell, at ~4mm, a 245 tread may still rub without a spacer. dubbe, i think you're hosed. but i really want you to prove all this wrong... i would love to put some 255 tread up front!
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08-09-2011, 02:01 PM | #5 |
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i'm surprised you haven't done a test fit with one of your rears yet. jack it up and flip 'em already!
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08-09-2011, 02:10 PM | #6 |
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I'm not that lazy, ha... I have 225 on all 4's now. Will report back with my findings...
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