Wheels Rubbing;8th gen stock 16s to stock 18s - Chevy Impala Forums
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post #1 of (permalink) Old 04-15-2011, 05:57 AM Thread Starter
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Wheels Rubbing;8th gen stock 16s to stock 18s

Hey everyone......i got a small problem......I have an 08 LT that had stock 225/60/16 wheels and tires. I bought another set of stock GM wheels and tires off of ebay that were off of a 11 LTZ and measure 235/50/18. Now Im hearing a rubbing noise in the back tires. I just did the swap last night and havnt had a chance to pin point the rubbing so I will update when I find out. I was just wondering if anyone has run into this before.

Thanks

Last edited by TSS; 01-20-2012 at 08:27 AM.
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post #2 of (permalink) Old 04-15-2011, 06:08 AM
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Thats very strange, since you only increased your total wheel+tire diameter by .63 inches....

Perhaps the wider tires is whats causing the issue? The 2011 LTZ had suspension that is fairly different from your 08 LT... I bet they are rubbing against the lower strut plate. Just run your fingers along the inner edge of the tire until you feel the contact, should be easy to pinpoint.

If it IS rubbing against the strut, you could,
a) buy a spring/strut package that is specific for the 2011 LTZ
b) get a BFH and hit the bottom strut plate out of the way of the contact point. Bending that strut plate up should cause any issue as long as the coil spring is still seated properly.

I believe in 2009, the "sport suspension" became standard on the LTZ (someone correct me if Im wrong). THis is also the reason why some people have issues running the SS style wheels on their LS, its because the struts are different and dont allow for the same amt of clearance. Lots of people saw this issue. One more reason why, before you buy, GOOGLE FTW.

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post #3 of (permalink) Old 04-15-2011, 07:12 AM
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I would have to agree with the previous post that this is likely the result of the difference in tires as well as the differences between the model years. I am going to provide you a link to a site where you can get parts, if you do decide to make further changes to accommodate the new tires. You can get parts information at GM Parts Direct: Your direct source for Genuine GM Parts. If you have further questions, please feel free to contact me. Thank you.

Tricia, GM Customer Service.
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post #4 of (permalink) Old 04-15-2011, 07:54 AM
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Has everything to do with the suspension as stated by Alfredo. Some LS/LTs take the factory 18s with no issues, some have issues. You were unlucky on this one. Yes, the LTZ and SS, in 09, had the same FE3 setup.

A guy on NAIOA. Impalajoe, has all the details. He experienced the same thing as you and fixed it. He determined it was the trailing arms and he got SS rear trailing arms (like 106 bucks) which solved it. Get on there and PM him maybe for more help. Good guy - in fact I bought my winter factory LT 16s from him, which he had replaced with the LTZ 18s (after solving the rubbing issue). For your edification, there is never any issues going from factory 18s to FACTORY 16s of course. The LTZ and SS set up will accomodate both 18s and 16s from the factory. So, if you make changes as needed for the 18s, you can still use your 16s in the winter!

2009 Impala SS (sold 3/2012);
2014 Impala Limited LTZ
2010 Buick Enclave CXL;
2010 Lincoln MKS AWD Twin Turbo, Livernois Motor Sports tuned, 0-60 in 3.94 seconds , 1/4 mile 12.80 @ 104 MPH




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post #5 of (permalink) Old 04-15-2011, 09:20 AM Thread Starter
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Thanks for the fast response everyone!! There is about 1/4 inch gap from the tire to the strut plate so I dont think thats the issue but I'll know more when I get home from work today and get it jacked up. I'll make sure to check the trailing arms.

Thanks again
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post #6 of (permalink) Old 04-15-2011, 01:18 PM
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Keep us posted..... No probelm either - glad to have you here.

2009 Impala SS (sold 3/2012);
2014 Impala Limited LTZ
2010 Buick Enclave CXL;
2010 Lincoln MKS AWD Twin Turbo, Livernois Motor Sports tuned, 0-60 in 3.94 seconds , 1/4 mile 12.80 @ 104 MPH




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post #7 of (permalink) Old 04-16-2011, 09:20 AM Thread Starter
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Problem Solved!! The drivers side rear tire was rubbing the strut plate and occasionally the rear control arm. No damage was done to the tire though. My rub wasnt near as bad as what impalajoe experienced but his thread was very helpful. BFH + new offset control arms = no more rubbing. Thanks again everyone
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post #8 of (permalink) Old 04-16-2011, 12:01 PM
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post #9 of (permalink) Old 10-18-2013, 05:48 AM
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I have a 2008 Impala LS ... Had basic steel wheels With 225/60R16 from Factory.... Bought a Set of 2006 Impala SS Wheels & tires size 235/50R18. Put them onto my Car With no Problems. Clears everything. I compared tires side by side. Seem to be same circumference. Worked out Great. You can see result in my new pic in Avatar. <<<<<<<<<<<<<
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post #10 of (permalink) Old 10-18-2013, 09:49 PM
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