Overinflated Fronts?
Thread Starter
Racer
Joined: Jan 2009
Posts: 405
Likes: 0
From: Arlington Texas
Overinflated Fronts?
I own and love driving my '10 Grand Sport Coupe. After about 14,000 miles, my front Michelins were worn out in the center (see photo). I believe that this pattern develops from over-inflating the tires, but I keep mine at the OEM pressure of 30 psi.
BTW, the rears, with the same mileage, still have sufficient tread to pass the state inspection.
Anyone have an idea what I need to do to get more uniform front tire wear?
-Clark
BTW, the rears, with the same mileage, still have sufficient tread to pass the state inspection.
Anyone have an idea what I need to do to get more uniform front tire wear?
-Clark
Last edited by clarkakirby; Nov 20, 2013 at 04:40 PM. Reason: clarification/correction
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
The tire does appear to exhibit over inflation.
If the edges are even then this would appear to be the case. Double check your inflation procedure/tools.
I run my street only Vette with 30-31 HOT psi. Which depending on the outside temp. will be 26-28 cold psi.
Do a Forum search for EvilTwin and tire tuning.
If the edges are even then this would appear to be the case. Double check your inflation procedure/tools.
I run my street only Vette with 30-31 HOT psi. Which depending on the outside temp. will be 26-28 cold psi.
Do a Forum search for EvilTwin and tire tuning.
Last edited by Boomer111; Nov 20, 2013 at 05:20 PM.
Le Mans Master
Joined: Sep 2008
Posts: 8,022
Likes: 8
From: Stafford VA, home of our wolf den. No house break ins to date.
if you are running OE 30 psi..cold...thats very strange...I run 32psi front and 30 psi rear, my OE tires are perfectly wearing at 15,000 miles. Do you do a lot of just highway cruising...ie: straight lines? The normal wear pattern for fronts is a slightly more worn left front outside crown edge due to the fact that the majority of turns you make are right hand turns... curious.....
Safety Car
Joined: Dec 2007
Posts: 4,974
Likes: 148
From: Magnolia Texas
if you are running OE 30 psi..cold...thats very strange...I run 32psi front and 30 psi rear, my OE tires are perfectly wearing at 15,000 miles. Do you do a lot of just highway cruising...ie: straight lines? The normal wear pattern for fronts is a slightly more worn left front outside crown edge due to the fact that the majority of turns you make are right hand turns... curious.....
based on Wolfdogs advise, started running 32/30 front/rear pressures 25000 miles ago in FWO's. Pulled tires and check tread wear and all tires are wearing consistently across the tread. Aligned for street use when tires put on 3 +/- years ago.
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
OP, not being critical of your methods or tools. however, it's possible that whatever tool you're using is out of calibration . I'd suggest getting a new one---doesn't have to be super expensive, just don't drop it.
I'd also suggest doing your tire pressure test first thing in the morning. and altho it may not be off by much, I wouldn't rely on the pressures in the DIC as accurate. 1 or 2 lbs. low on the DIC, 1 or 2 low by your gauge and you could be at 4 or more higher than normal.
and btw, where do you park your car when you take the tire pressure (indoor, outdoor, in sun, shade, etc.)?
I'd also suggest doing your tire pressure test first thing in the morning. and altho it may not be off by much, I wouldn't rely on the pressures in the DIC as accurate. 1 or 2 lbs. low on the DIC, 1 or 2 low by your gauge and you could be at 4 or more higher than normal.
and btw, where do you park your car when you take the tire pressure (indoor, outdoor, in sun, shade, etc.)?
Melting Slicks
Joined: Jan 2003
Posts: 2,026
Likes: 178
From: Jacksonville, NC
I had the same thing on two separate sets of tires. Good year guy told me it was the nature of the beast with runcraps. If anything, I ran my fronts a little under inflated. Here is a pic of mine with 10,000 miles. Will see if this last set of non run craps do the same and then I will know.
Still on the original rears with about 50% left.
Still on the original rears with about 50% left.
Team Owner
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
OP, not being critical of your methods or tools. however, it's possible that whatever tool you're using is out of calibration . I'd suggest getting a new one---doesn't have to be super expensive, just don't drop it.
I'd also suggest doing your tire pressure test first thing in the morning. and altho it may not be off by much, I wouldn't rely on the pressures in the DIC as accurate. 1 or 2 lbs. low on the DIC, 1 or 2 low by your gauge and you could be at 4 or more higher than normal.
and btw, where do you park your car when you take the tire pressure (indoor, outdoor, in sun, shade, etc.)?
I'd also suggest doing your tire pressure test first thing in the morning. and altho it may not be off by much, I wouldn't rely on the pressures in the DIC as accurate. 1 or 2 lbs. low on the DIC, 1 or 2 low by your gauge and you could be at 4 or more higher than normal.
and btw, where do you park your car when you take the tire pressure (indoor, outdoor, in sun, shade, etc.)?
I bought three different digital gauges and compared them against each other, the max variation was .5 lb so I suspect they are accurate.
Slightly overinflate the tires in the evening, then park the car in a garage overnight and bleed the pressures down to 30 in the morning.
If you are already doing that, then I'm
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
I bought three different digital gauges and compared them against each other, the max variation was .5 lb so I suspect they are accurate.
Slightly overinflate the tires in the evening, then park the car in a garage overnight and bleed the pressures down to 30 in the morning.
I f you are already doing that, then I'm
Mine is garaged parked so no issues of the sun adding heat.
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