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06-18-2011, 02:01 PM
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CC Member
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Join Date: Jan 2007
Location: Greensboro,
nc
Cobra Make, Engine: 65 Backdraft Cobra 347 with webers
Posts: 85
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Not Ranked
xxxxxxxxxx
Last edited by pbarker; 11-03-2011 at 05:45 PM..
Reason: xxxxxxxxxx
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06-18-2011, 03:18 PM
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CC Member
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Join Date: Nov 2007
Location: Clayton,
IN
Cobra Make, Engine: ERA 838
Posts: 1,127
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Not Ranked
live axle or independent?
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06-18-2011, 03:19 PM
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CC Member
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Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,027
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Not Ranked
What do you mean by "outer bottom edges"? Only the outside edge on both tires?
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06-18-2011, 03:33 PM
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Super Moderator
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Join Date: May 2001
Location: Fresno,
CA
Cobra Make, Engine: KMP 184/482ci Shelby
Posts: 14,448
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Not Ranked
Obviously, you need to do burnouts...it evens out the wear so they'll be slick all the way across.
Are you sure the inner edges aren't worn too? If they are...underinflated.
If not, and it's an IRS (assume it is given it's a Backdraft)...get it aligned.
__________________
Jamo
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06-18-2011, 06:06 PM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,027
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Not Ranked
Either to much positive camber, or the toe in is off. Or it could be a combination of both.
__________________
John Hall
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06-18-2011, 06:56 PM
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CC Member
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Join Date: Nov 2000
Location: Flower Mound, TX,
tx
Cobra Make, Engine: Lonestar LS 427, Keith Craft 501,Toploader
Posts: 883
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Not Ranked
Also, I would get down and take a look at your car from the rear. If you can clearly see that your tires are towed in, try lowering your suspension. If your coilovers are adjusted way too tight, you will wear the outsides of your tires.
__________________
" It ain't no big deal" 
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06-18-2011, 07:03 PM
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CC Member
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Join Date: May 2006
Location: Portland,
OR
Cobra Make, Engine: ERA FIA, 1964 289->Webers
Posts: 3,689
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Not Ranked
Center of tire=over inflated, Both outer edges=under inflated, One edge or the other or uneven wear across the tread is an alignment problem.
__________________
ERA FIA 2088
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06-18-2011, 07:15 PM
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CC Member
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Join Date: Mar 2005
Location: Mesa,
AZ
Cobra Make, Engine: FFR from Levy Racing 302 FI w/Edelbrock Performer heads
Posts: 1,644
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Not Ranked
Yeah got to go with under-inflated.
__________________
dave from mesa
Vietnam Vets may be eligible for medical care and disability compensation. Contact the VA if you have prostate cancer or type 2 diabetes. Finally got around to going to the VA.
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06-18-2011, 07:25 PM
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CC Member
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Join Date: Nov 2000
Location: Flower Mound, TX,
tx
Cobra Make, Engine: Lonestar LS 427, Keith Craft 501,Toploader
Posts: 883
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Not Ranked
Underinflated tires will wear on the inside AND the outside of the tires.
__________________
" It ain't no big deal"
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06-19-2011, 09:39 AM
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CC Member
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Join Date: Jul 2010
Location: Augusta,
MO
Cobra Make, Engine: Sold ERA FIA 2139, 331 Weber IDF
Posts: 279
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Not Ranked
400 miles and bald on one of the edges on both the tires (that what I get from the post) sounds like a terrible alignment issue.
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06-19-2011, 01:17 PM
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CC Member
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Join Date: Jan 2007
Location: Greensboro,
nc
Cobra Make, Engine: 65 Backdraft Cobra 347 with webers
Posts: 85
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Not Ranked
Hey guys Thanks. I am going to get an alignment done. Just hope that corrects the problem. It is only wearing on the outside bottom of both rear tires. Rest of rear tires looks great. Running around 30lbs in tires. Got to get the wear problem solved before I get two new tires as they are not cheap.
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06-19-2011, 01:31 PM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,027
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Not Ranked
Don't be surprised if you have to buy new tires so they can do an alignment.
__________________
John Hall
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