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Old 07-28-2009, 06:35 AM   #1
Technological.ws
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2008 Impreza STI 08

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Both left wheels on my 08 STI have been stolen.
My insurance covers this. They are going to purchase 2 new STI wheels with Dunlop SP 600 tires (same as stock).

I know that I can't put the new tire and the old one on the same axle because it can hurt LSD. I'm going to put both new tires on the same axle.
The problem is that my current front and rear tires are worn slightly differntly. I don't know if it's safe for LSDs to put them on the same axle.

How much difference in tire tread wear is acceptable on the same axle with an LSD?
Will it really hurt the LSD if the thread wear difference is 2 mm?
Should I buy new tires even if the wear difference is little?

I have a helical LSD on the front and a Torsen unit on the back.
Which axle is it better to install the differently worn tires? I mean which LSD type is less sensitive for differently worn tires?

Many thanks for your help in advance.
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Last edited by Technological.ws; 07-28-2009 at 06:41 AM.
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Old 07-28-2009, 08:25 AM   #2
Luke@tirerack
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in order to avoid issues your remainign tires should have at the minimuum 7/32" tread depth. If they do not have the new tires shaved to match the old tires ....
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Old 07-28-2009, 10:30 AM   #3
mosc
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I think your center diff would be the most sensitive with your setup.

What are the tread depth measurements on your tires exactly? What is the new depth? You have a maximum of 3/32" of leeway but ideally it should be closer than that.
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Old 07-28-2009, 03:59 PM   #4
Technological.ws
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The tread depth of my two remaining tires are 15/64" and 17/64" (outer side near the center of the tread).
I don't know the tread depth of a new tire. I think that it's more than 19/64".

I'm not sure if I can find a workshop that can shave tires. I doubt there is one nearby.

What would you suggest to do?
Should I install all the four new tires?
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Old 07-28-2009, 04:17 PM   #5
Jons_uurx
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i have a friend with an 05 sti and his center diff. was locking up due to uneven tires, he bought 4 new tires and it went away.
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Old 07-28-2009, 04:31 PM   #6
mosc
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Buy 2 from tirerack and they'll shave em for ya ($). The 1/32 difference between your two existing tires isn't hurting anything.
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Old 07-28-2009, 10:45 PM   #7
Uncle Scotty
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put the new tires on the back and done
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