STT Pro 37s Load Range D or E

[JoeB-JKURX]

I'm moving from my 35" KM2s to 37" STT Pros. I'm inclined to go to the 13.50x17 because it is Load Range E (likely a stronger sidewall) but am concerned that the ride will be too stiff for my 2014 Rubicon X that has (probably) 800# of added weight through various mods and adds. The 12.5x17 is offered in Load Range D which is what I run on the KM2s and the ride is OK. Any opinions on the various trade-offs would be appreciated. Thx

[wayoflife]

The 13.50's is what I run and mainly because of the range E rating. I just run them at a lower psi like 28 or so.

[jdofmemi]

I was wondering the same thing, as that will likely be my next set of tires.

Glad to hear it.

[JoeB-JKURX]

The 13.50's is what I run and mainly because of the range E rating. I just run them at a lower psi like 28 or so.

Sounds like a plan. Thx

[Red Knight15]

I have the 37x13.50s Load range E. I’m running 28psi on highway and 12 off road. They ride fine.


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[RESURECTIONJK]

I will echo what everyone is saying as well. I run the STT pro in a 37x13.50 load range E on my 4dr and I’m probably close to 700 lbs heavier than stock. But that’s just s guess. I run 28-30 psi and it’s fine on the roads here in salt lake. Trail pressure is 8-12 depending where I’m at.

[desertrunner]

I have the 37x13.50s Load range E. I’m running 28psi on highway and 12 off road. They ride fine.


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Exact same for me as well

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[Ddays]

I'm running the 37x13.50's Coops too. My CAT scale weight fully loaded is just under 6000#. I run 26# highway, but our roads in PA suck donkey dick, so there's that. Best starting point to figure psi is to do the chalk test. You can fine tune from there if you want

[SLO]

That’s the only thing I don’t love about jumping to 40’s. The STT’s (as well as Nitto) go to a C rating. Does stiffer sidewall necessarily mean stronger, though? Ply is still the same right?


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[wjtstudios]

I was wondering the same thing. The BFG 39-13.5s go to a load range c as well. Are the plys thicker on the larger tires? Is that why they don’t use as many as the Ds and Es?


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