Tire PSI with z06 rims Fbody
03-22-2012, 12:45 PM
#2
TECH Regular
Usually if you just want to minimize tire wear and wear them down evelny just put them at the suggested tire pres. thats on the sidewall of your tire. I run my fronts at 35 and rears (Nitto NT05s) at around 30.
either I'm retarded, blind or it's not there
03-22-2012, 12:52 PM
#4
TECH Regular
Everyone has a dumb question every now and then haha, yea I think the highest my tire pres. has ever been at was 40 psi. Just dont run them too high or too low, I think 30-35 is the desired tire pressure for trying to maximize tire life on dry road.
03-23-2012, 01:21 AM
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There is a sticker on the driver's door jamb of most GM cars (including F-bodies) that lists tire pressure recommendation specific to the car (it's 30psi front and rear for these cars).
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03-23-2012, 03:30 AM
#8
TECH Regular
The number on the sidewall of the tire is maximum pressure for that tire, not recommended tire pressure for a specific vehicle application.
There is a sticker on the driver's door jamb of most GM cars (including F-bodies) that lists tire pressure recommendation specific to the car (it's 30psi front and rear for these cars).
There is a sticker on the driver's door jamb of most GM cars (including F-bodies) that lists tire pressure recommendation specific to the car (it's 30psi front and rear for these cars).
03-23-2012, 08:09 AM
#9
Max tire pressure on the sidewall is the tires' limitations. You'll note also a rating for maximum weight in lbs and kgs too, which our cars do not approach.
The air in the tires holds the car up. Heavier car squires more air ( pressure ). Lighter cars require less air ( pressure. ). The sticker on the car is the vehicle manufacturers recommendation based on ride/handling, even wear, gas mileage etc based on the vehicle platform ( weight, intended usage etc ). That being said, some people add more or less air for their own reasons, towing, tires with stiffer/softer sidewalls etc.
For the record, I have GSD3s in 275-40-17 and run Fr 31-32psi, Rr 30-31psi with no uneven tirewear whatsoever. The front is heavier so I run them a little higher. The rear is lighter, and to promote traction, I run the rears a little lower. I have not experimented too wildly since the tires are $$ and going too far one way or another could be an expensive experiment lol!
Anyone else have experience with different pressures?
The air in the tires holds the car up. Heavier car squires more air ( pressure ). Lighter cars require less air ( pressure. ). The sticker on the car is the vehicle manufacturers recommendation based on ride/handling, even wear, gas mileage etc based on the vehicle platform ( weight, intended usage etc ). That being said, some people add more or less air for their own reasons, towing, tires with stiffer/softer sidewalls etc.
For the record, I have GSD3s in 275-40-17 and run Fr 31-32psi, Rr 30-31psi with no uneven tirewear whatsoever. The front is heavier so I run them a little higher. The rear is lighter, and to promote traction, I run the rears a little lower. I have not experimented too wildly since the tires are $$ and going too far one way or another could be an expensive experiment lol!
Anyone else have experience with different pressures?
03-23-2012, 11:15 AM
#10
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A little. I've used the OE recommendation of 30/30 and also tried 32F/30R with stock tire sizes on 16x8, 17x9 and 17x9.5 wheels. Overall, I've been happiest with the 32F/30R pressures, seeing excellent wear (evenly) and best performance. Maybe it's just in my head, but 32psi up front seems to improve steering feel over the 30psi factory recommendation - either way I've gotten perfectly even tread wear even with the extra 2psi up front.
Tire pressures should be reduced some if you oversize the tire (meaning, run a tire that's a bit too wide for the wheel). This will help promote even wear.
03-23-2012, 11:30 AM
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Max tire pressure on the sidewall is the tires' limitations. You'll note also a rating for maximum weight in lbs and kgs too, which our cars do not approach.
The air in the tires holds the car up. Heavier car squires more air ( pressure ). Lighter cars require less air ( pressure. ). The sticker on the car is the vehicle manufacturers recommendation based on ride/handling, even wear, gas mileage etc based on the vehicle platform ( weight, intended usage etc ). That being said, some people add more or less air for their own reasons, towing, tires with stiffer/softer sidewalls etc.
For the record, I have GSD3s in 275-40-17 and run Fr 31-32psi, Rr 30-31psi with no uneven tirewear whatsoever. The front is heavier so I run them a little higher. The rear is lighter, and to promote traction, I run the rears a little lower. I have not experimented too wildly since the tires are $$ and going too far one way or another could be an expensive experiment lol!
Anyone else have experience with different pressures?
The air in the tires holds the car up. Heavier car squires more air ( pressure ). Lighter cars require less air ( pressure. ). The sticker on the car is the vehicle manufacturers recommendation based on ride/handling, even wear, gas mileage etc based on the vehicle platform ( weight, intended usage etc ). That being said, some people add more or less air for their own reasons, towing, tires with stiffer/softer sidewalls etc.
For the record, I have GSD3s in 275-40-17 and run Fr 31-32psi, Rr 30-31psi with no uneven tirewear whatsoever. The front is heavier so I run them a little higher. The rear is lighter, and to promote traction, I run the rears a little lower. I have not experimented too wildly since the tires are $$ and going too far one way or another could be an expensive experiment lol!
Anyone else have experience with different pressures?
I have not checked them hot to see if I am correct and I don't think in every day driving 1# would be noticeable.
Todd
03-23-2012, 11:37 AM
#12
^Interesting idea. I know that running a tire UNDER inflated causes a tire to run hotter. This is not the case with dropping the front 1-2 psi obviously. The recommended tire pressure is to be adjusted COLD. I think the manufacturer is fine with the expansion from that point, so an evening out when hot is not as critical.
03-23-2012, 11:49 AM
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Once I get a few things done I will try it both ways and go with whatever feels best to me. From a wear standpoint I rotate them front to back so unless I see something I don't think a pound or two is going to cause a problem.
Todd
Todd
03-23-2012, 11:53 AM
#14
TECH Regular
@ RPM WS6 Ah I see.
@ peweter2002 I have dropped my NT05's in the back to 20psi to see if it'd help grip a bit when it was a colder day on the street, it helped a little but it wears down the tread faster.
@ peweter2002 I have dropped my NT05's in the back to 20psi to see if it'd help grip a bit when it was a colder day on the street, it helped a little but it wears down the tread faster.
03-26-2012, 02:21 PM
#17
I would think GM set the tire pressure to achieve a desired handling setup based on the tire fitted to the car. Going to a different tire size (i.e. 315/35/17) would require a different pressure to achieve the same weight bearing capability of the tire. . Essentiall how much weight needs to be supported by X amount of tread area.
03-26-2012, 04:49 PM
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I would think GM set the tire pressure to achieve a desired handling setup based on the tire fitted to the car. Going to a different tire size (i.e. 315/35/17) would require a different pressure to achieve the same weight bearing capability of the tire. . Essentiall how much weight needs to be supported by X amount of tread area.
