Bluegoose972
Well-Known Member
- First Name
- Rick
- Joined
- Mar 4, 2018
- Threads
- 6
- Messages
- 106
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- 67
- Location
- Belton, TX
- Vehicle(s)
- 2018 JLUR Firecracker Red, 1966 Mustang Convertible (rebuilding)
- Thread starter
- #1
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28psiHave 37x12.5x17 Toyo's on 17x8.5" wheels. Pressure was set at 40 psi, but can see that there is uneven wear. What pressure are you guys running with a similar setup. Thinking of dropping another 5 psi to 35 psi and watching the wear pattern.
Every vehicle is going to be a little different as to what PSI to run. The best way to determine what PSI will be best for your vehicle will be to do a chalk test on the tires like @FatBoy01 shared below. I won't lie, it can be tedious, but it will tell you where you need to be.Have 37x12.5x17 Toyo's on 17x8.5" wheels. Pressure was set at 40 psi, but can see that there is uneven wear. What pressure are you guys running with a similar setup. Thinking of dropping another 5 psi to 35 psi and watching the wear pattern.
But a chalk test will get him to exactly where he needs to be without spit balling...About 28-30 psi should get you where you need to be.
Been there. Done it. 28-30 is pretty basic on 35’s and up. Just trying to help him speed things up. Tire pressures are going to rise and fall all day long. 1-2 psi difference with a chalk test isnt going to get anything exact.But a chalk test will get him to exactly where he needs to be without spit balling...
Exactly and couldn't have said it better.I run 25psi cold in my E-Rated 37" Coopers, and every time I tell someone they look at me like I'm nuts..... I've been doing this since 2012 on all my E-Rated tires(17" Wheels), and not once have I run into any issues. The chalk test shows that I can even go lower, but I'm content with slightly uneven wear at 25-27psi(depending on outside temperature.) There are formulas online that help you calculate tire pressure based on your GVRW & Tire Load Rating @ max PSI on the tires. When using that calculation it tells me to run 26psi on my Coopers when my vehicle is fully loaded(Which it rarely is, but I factor in bumper/winch weight etc.)
Early on I even used a Temperature gun to make sure my tires weren't overheating when on the highway for over an hour...
Hey, looks like your formula and my table lookups arrive at about the same number ~26 PSI. Cool.I run 25psi cold in my E-Rated 37" Coopers, and every time I tell someone they look at me like I'm nuts..... I've been doing this since 2012 on all my E-Rated tires(17" Wheels), and not once have I run into any issues. The chalk test shows that I can even go lower, but I'm content with slightly uneven wear at 25-27psi(depending on outside temperature.) There are formulas online that help you calculate tire pressure based on your GVRW & Tire Load Rating @ max PSI on the tires. When using that calculation it tells me to run 26psi on my Coopers when my vehicle is fully loaded(Which it rarely is, but I factor in bumper/winch weight etc.)
Early on I even used a Temperature gun to make sure my tires weren't overheating when on the highway for over an hour...