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Old 10-26-2008, 12:21 AM   #1
240STi
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Default 18x7.5+235/40/r18=Rub?

I have a 05 STI lowered on COBB springs. While on the stock 17inch BBSs there were no rubbing issues at all---GREAT.
I got my hands on a set of 18inch Rims, with 235/40/R18 rubber on them. As I installed the rims/tire combo I did not notice any rubbing or touching of the tire on anything. Everything looked okay and reeady to roll, I even turned the wheels both L&R all the way....still nothing was rubbing. After driving couple hundred miles, I notice that the front tires were wearing down badly on the insides. can someone explain whats the problem. Is it the tire size? is it the alignment? or is it because I dont have coilovers? I dont think it is my alignment, although I hope it is.

Has anyone else had a problem fitting 235/40/R18 on there stock vehicle with springs? I understand that these rims are 1/2 inch wider than stock so that could be the problem.
What can I do to fix this problem instead of buying a new set of tires at every thousand miles?

My 235/40/R18 tires are rubbing on something and wearing down evenly on the inside of just the front tires. I cannot see where it is rubbing at inside the wheel well, there are no rubbing marks, which makes me think alignment, but I need some extra input.
The person I got the rims and tires from had coilovers so I can understand why it wouldnt rub on this ride.
THANks in advance any input at ALL would be helpful
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Old 10-26-2008, 12:39 AM   #2
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It sounds like alignment. What you need to give is the offset of the wheels however.

Do you have massive amounts of negative camber in the front? It could be the toe as well. I would get it up in the air and do a more extensive search and if you didnt get the car aligned after the lowering springs you need that done as well.
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Old 10-26-2008, 12:56 AM   #3
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that for sure sounds like an alignment issue. probably something to do with your toe.
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Old 10-26-2008, 02:04 PM   #4
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Quote:
Originally Posted by howfast? View Post
Do you have massive amounts of negative camber in the front? It could be the toe as well. I would get it up in the air and do a more extensive search and if you didnt get the car aligned after the lowering springs you need that done as well.
+1 for camber wear. I have 235/40/18 not sure of the offset but have had 0 problems although I'm at stock height. Probably a result of being lowered w/only springs... don't know if an alignment will help it, how recent did you put your springs on? Every set takes a little while to settle to true height.

I'd take her up at an alignment shop and see what the pros say. GL keep us posted.
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Old 10-26-2008, 02:24 PM   #5
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this is a TOE issue!!!!!!

lowering the car alters the TOE and eats tires

it is difficult to get enough camber with these cars to wear tires like this
ESPECIALLY AFTER ONLY A FEW HUNDRED MILES!!!!!
THE TOE IS BORKED

and those tires are a bit wide on that wheel
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Old 10-26-2008, 03:45 PM   #6
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camber wear is a myth
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Old 10-26-2008, 05:29 PM   #7
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+1 each for Uncle Scotty and yerrow

sounds toed out, waay out
and 235s fit better on 8 inch wheels...
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Old 10-27-2008, 01:14 AM   #8
240STi
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what size would you guys recommend? for this size rim(18x7.5) on a 05 sti w/springs? So noone has had a issue with these size tires and rims on a sti right?
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Old 10-27-2008, 01:23 AM   #9
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Quote:
Originally Posted by 240STi View Post
what size would you guys recommend? for this size rim(18x7.5) on a 05 sti w/springs? So noone has had a issue with these size tires and rims on a sti right?
well...for one...ya got the wrong size wheels

a 18x7.5 is a waste of time
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