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Living in the Central Sierras of CA, tire sellers in our area our recommending that tires be inflated to 40 PSI at all four corners to equalize wear patterns on the treads - - the winding roads tend to cause wear on the outsides of the tires at lower pressures.
My question is this; should I do the same thing with the tire pressures on my 2007 C6 base coupe and raise the pressures to 40 PSI, or because of the wide tires, use lower pressures like 32 - 35 PSI? I generally take it easy with my driving and don't "push" the car through the curves.
I apologize if this question has come up elsewhere - - I did a search and could find nothing about this issue.
Should be 30 psi cold. I tried running 30 psi hot for a while, per recommendation of a former C5 engineer, and found that edges of the tire wore first. I went back to the 30 psi cold and the tires are wearing more evenly. Now this is street driving and track will be a different story.
Going 40 psi will undoubtedly wear the centers out in a hurry, comparatively speaking.
Tire sellers in your area are doing just that - selling tires. The quicker their customers wear out tires, the quicker they get to sell them more tires.
All GM cars, SUV's and trucks come with a tire pressure label in the driver's door frame. Tire pressure for your Corvette is 30 psi cold ( will reach 34-35 when the tire is hot).
At most, add a couple of lbs if it makes you feel better (32-33 lbs)
But if you've got the wheel alignment set for street use per PFADT, that's all you need.
30psi cold is the factory inflation recommendation, and it's a good one. I'll second Vette_DD's PFADT alignment recommendation. That means easing the front camber setting from -0.45 degrees to -0.10 degrees. This sets the front tires closer to perfectly upright and not leaning on their inside corners as they roll straight down the road. The factory camber setting will scrub the inside corners of your front tires down to steel cord in 10K-13K miles. The PFADT settings should allow you to get 22K+.
40 cold is way too high and would likely result in the TPMS system giving you an overpressure warning when the weather warms up and you are at speed on the highway. That warning comes at 44 psi.
This is in addition to wearing a stripe around the middle of the tread.
Different brands can equate to different pressures.
Yes OEM Goodyear is 30 psi ft and rear.
Alignment specs also play a factor.
How you drive also plays a factor.
I too think 40 may be too high, especially once up to operating temperature and perhaps you'll have excess wear in the center thread of the rear tires. Plus as noted TMPS messages.
A pyrometer is needed.
FWIW for me with an 05 Z51 and Firestone runflats 26 re 33 ft has a feel I prefer with no excess wear factor.
40 cold is way too high and would likely result in the TPMS system giving you an overpressure warning when the weather warms up and you are at speed on the highway. That warning comes at 44 psi.
This is in addition to wearing a stripe around the middle of the tread.
The tire seller wants the OP to return for new tires soon due to the worn center tread with the tires inflated to 40 lbs.
I help at the gas stations airing stations all the time. The people tend not to use a gauge and if they have one go by the max psi on the tire sidewall.
I just have an passion for proper psi, comes from driving 18 wheelers for 35 years.
At your 3,700 ft elevation, the TPMS sensors will read slightly low, so use a good handheld gauge and note what the TPMS registers. The gauge pressure is the correct one to use...the TPMS for detecting a flat or leak only.
Contrary to an earlier statement regarding camber, toe settings cause more wear than camber settings. I've run -1.5 on the fronts with zero toe on GY runflats that lasted 22k+ miles. Toe out settings will cause your car to turn-in more quickly and may make it feel a little squirrely under hard acceleration, toe in will make it seem a little more stable. I prefer 0-toe both for tire wear plus stability.
40 cold is way too high and would likely result in the TPMS system giving you an overpressure warning when the weather warms up and you are at speed on the highway. That warning comes at 44 psi.
This is in addition to wearing a stripe around the middle of the tread.
You are correct ....however......there is this: I live in central Pa. ...my GS sits in the garage for a good portion of Dec - Feb.....I have found that if I inflate the tires to 40psi cold....they really avoid the severe "flat spots" that I used to get at the 30psi that I used to keep them at. So....depending upon where you live and when you ride...the higher pressure ( for storage) can make a positive difference.
Contrary to an earlier statement regarding camber, toe settings cause more wear than camber settings. I've run -1.5 on the fronts with zero toe on GY runflats that lasted 22k+ miles. Toe out settings will cause your car to turn-in more quickly and may make it feel a little squirrely under hard acceleration, toe in will make it seem a little more stable. I prefer 0-toe both for tire wear plus stability.
I have .01 and .02 front toe "in" with mild camber of .6 Tire's wearing fine.
A little toe helps with stable steering.
I tired zero toe and zero camber, per a fellow forum member, and it was horrible.
02-20-2017, 04:58 PM
Recommended Tire Pressures
The tire seller wants the OP to return for new tires soon due to the worn center tread with the tires inflated to 40 lbs.
