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06-07-2017, 10:01 AM
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#1 |
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Advise needed for tire rub
Need to find out what the long term affect of this tire rub. The mark is at base of tire tread and appears to occasionally run top of fender. I can not feel any issue while driving.
This is a brand new wheel/tire setup (315/35/20 and 275/40/20 front). My car is lowered with B&G springs with 1.2 drop at front. There was a miscommunication on aspect of front tire, I thought it was going to be a 30 series. The receipt did state 275/40 and I failed to see that. I understand that we are only talking about a few millimeters difference in height between 40 and 30 series. From the picture, it looks like all I would need is a few millimeters to avoid the rub. Is this simply a nuisance that might lead to premature tire wear, is there danger of fender damage and/or significant tire issues? If there is a significant cause for concern either with tire or fender damage, then I need to ditch these tires soon and replace with 30 series. If this is nuisance that will not cause much issue, then I will replace with 30 series at next tire purchase.    Thanks in advance -Chris |
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06-07-2017, 10:07 AM
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#2 |
       
Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012
Location: Southeast, PA
Posts: 2,092
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It's not really a small difference between 275/40 and 275/30. 275/30 comes out to 82.5mm tall and 275/40 comes out at 110. Remember the second number is a percentage of the first number, not an actual number. You are talking about a whole inch difference.
If that setup is supposed to be run with 275/30, I would make the switch now, before you damage the fender off a pothole or something rough.
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LS3 Crate Engine Swap | CSP Custom Cam 232/240 .615/.615 113 +3 | Stainless Power LT Headers | Z28 Intake | Borla S-Type Exhaust | FTI Triple-Disc Billet 3200 Stall
2012 Camaro 2SS/RS | 1968 Camaro SS | 2020 Cadillac CT5 Premium Luxury | 2021 Spark LS  |
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06-07-2017, 10:45 AM
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#3 |
  
Drives: Miss Con Ception Join Date: Aug 2016
Location: Chicagoland
Posts: 2,998
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As you sit now your front and rears are the same diameter. If you go with 30s on the front your ABS and StabilTrac may not function properly.
IIRC, 0.5" is the maximum difference in radius allowed.
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2011 1SS/RS LS3 CGM
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06-07-2017, 12:15 PM
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#4 |
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What about 275/35/20? I talked to tire store and there is 1/2 inch (shorter) difference between my tires at 275/40 and 275/35. That sounds like it would work for rub issue and max diff in radius
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06-07-2017, 01:48 PM
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#5 |
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I spoke with wheel/tire vendor and they think I actually have positive camber, top of tire is pushed too far out. Issue could be resolved with alignment and some negative camber
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06-07-2017, 02:42 PM
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#6 |
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"Old School"
Drives: 2010 2SS L99 Join Date: Apr 2015
Location: Sherrills Ford, NC
Posts: 1,295
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Only an alignment rack can tell you if your camber is out. Do that quick to prove or disprove the tire salesman's claim. The minute changes in alignment will not change much I bet. Your tire guy is trying to get out of replacing all your tires, that is their job.
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06-07-2017, 03:11 PM
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#7 |
Drives: 2017 Chevrolet SS 1LE Join Date: Oct 2016
Location: Los Angeles, California
Posts: 9,270
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Check your alignment brotha.
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06-08-2017, 07:36 AM
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#8 |
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Thanks for the advise guys - I will be taking it in today/tomorrow for front end alignment. I hate that I have to do this, because I have boxes of suspension goodies. Unfortunately it will be a few more weeks before I get to start that. Hopefully a quick front end alignment will answer this question and end this rubbing
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06-08-2017, 08:28 AM
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#9 |
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Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012
Location: Southeast, PA
Posts: 2,092
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I really don't think the alignment will end that much rub. Hopefully the place you take it has some knowledgable people that can help you out.
__________________
LS3 Crate Engine Swap | CSP Custom Cam 232/240 .615/.615 113 +3 | Stainless Power LT Headers | Z28 Intake | Borla S-Type Exhaust | FTI Triple-Disc Billet 3200 Stall
2012 Camaro 2SS/RS | 1968 Camaro SS | 2020 Cadillac CT5 Premium Luxury | 2021 Spark LS |
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06-09-2017, 01:11 PM
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#10 |
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Here is what the alignment found:
Right Front Camber: -.6 Left Front: Camber: -.8 Both are now at factory spec at -1.5 The is a significant visual difference but I did road test as well. I scrubbed the existing rub marks as best I could and applied some tire shine. Went for a spirited drive down some hilly country roads, good suspension exercise. There were no new rub spots. Before: After: 
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06-09-2017, 02:33 PM
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#11 | ||
Drives: Camaro Justice Join Date: Jun 2007
Location: Virginia
Posts: 20,174
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Quote:
Quote:
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06-16-2017, 02:52 PM
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#12 |
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Drives: Camaro Justice Join Date: Jun 2007
Location: Virginia
Posts: 20,174
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If you can tuck them a bit further with negative camber, you should be safe.
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06-17-2017, 03:04 AM
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#13 |
Drives: 2013 SS Supercharged Convertible Join Date: May 2013
Location: SoCal
Posts: 2,714
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What are your wheel sizes and offsets?
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06-18-2017, 01:37 PM
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#14 |
Drives: 2010 2SS/RS M6 Black on Black Join Date: Jan 2010
Location: Global Citizen
Posts: 1,243
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You should roll your front fender lips--NOW. But have a pro do it (don't ask me how I know). The real problem you have is your wheel offset--it's too much by at least 1/4". I have MPSS in 295 on my front and had rubbing. I couldn't get 285's which might have solved my problem. Not rolling my lips sliced up my fjrst set of tires after less than 1,000 miles. Over a grand to replace the first two.
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Meh
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