35's E-rated What PSI are you guys Running
04-07-2013, 04:21 AM
#11
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Advised by Toyo
See, everybody has a different answer and that's why I contacted Toyo. After the tech got all the info on my (2013 JK, sahara 4 door, auto tranny, 18 rims and 35" Toyo's) they came back with the answer, "we recomend 40psi cold"
04-07-2013, 04:35 AM
#12
With around 30psi, most tires of this size feel good and have the tread sit flat - which is what makes them wear evenly.
You may try the chalk test.
Inflate to 30psi, use a chalk to mark a thick line across the tread, drive a little bit, and look at the chalk line.
If the chalk is gone at the center, the pressure is too high. Lower the pressure by 2 psi and check again. If the chalk is still gone at the center, reduce by 2 more psi and re-check.
If the chalk is gone at the sides, the pressure is too low. Increase the pressure by 2 psi and check again. Not enough? -- add 2psi and re-check.
When the chalk line wears off evenly, that's the pressure for even tire wear.
Tire pressure changes with temperature.
If you filled in cold air, then drove on a highway in hot weather for 2 hrs, there will be a few psi increase, and vice versa when the temperature drops compared to the temp' of the air which was used to inflate.
Last edited by GJeep; 04-07-2013 at 05:10 AM.
04-07-2013, 04:54 AM
#13
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Been running the same tire as OP for over a year now at 30psi on the street, chalk tested, rotated every 5k, showing nice even wear patterns
Last edited by slider_68; 04-07-2013 at 05:55 AM.
04-07-2013, 05:48 AM
#14
JK Enthusiast
The 'recommended' pressure is typically too high.
With around 30psi, most tires of this size feel good and have the tread sit flat - which is what makes them wear evenly.
You may try the chalk test.
Inflate to 30psi, use a chalk to mark a thick line across the tread, drive a little bit, and look at the chalk line.
If the chalk is gone at the center, the pressure is too high. Lower the pressure by 2 psi and check again. If the chalk is still gone at the center, reduce by 2 more psi and re-check.
If the chalk is gone at the sides, the pressure is too low. Increase the pressure by 2 psi and check again. Not enough? -- add 2psi and re-check.
When the chalk line wears off evenly, that's the pressure for even tire wear.
Tire pressure changes with temperature.
If you filled in cold air, then drove on a highway in hot weather for 2 hrs, there will be a few psi increase, and vice versa when the temperature drops compared to the temp' of the air which was used to inflate.
With around 30psi, most tires of this size feel good and have the tread sit flat - which is what makes them wear evenly.
You may try the chalk test.
Inflate to 30psi, use a chalk to mark a thick line across the tread, drive a little bit, and look at the chalk line.
If the chalk is gone at the center, the pressure is too high. Lower the pressure by 2 psi and check again. If the chalk is still gone at the center, reduce by 2 more psi and re-check.
If the chalk is gone at the sides, the pressure is too low. Increase the pressure by 2 psi and check again. Not enough? -- add 2psi and re-check.
When the chalk line wears off evenly, that's the pressure for even tire wear.
Tire pressure changes with temperature.
If you filled in cold air, then drove on a highway in hot weather for 2 hrs, there will be a few psi increase, and vice versa when the temperature drops compared to the temp' of the air which was used to inflate.
04-07-2013, 09:00 AM
#17
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First I have 33s, but my tires(Trail Grapps) bounce like crazy with anything over 32 psi. I've found 29 psi to be perfect. So they may wear slightly faster, but I don't want to drive a springboard!
04-07-2013, 04:26 PM
#20
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so i just got a set of 35-12.50-17 cooper STT's and i'm running them at 26 psi i havnt done the chalk test or anything but i can see that the tire isn't sitting flat, the side lugs aren't even making contact with the road , they're E rated tires and i have a 2 door rubicon, i wanna take more out of them to get the tire to sit flat , but at some point i'm thinking it will be too low for road use, does anyone else run this size on a 2 door and have any suggestions ?