Well the 12.5s are d rated and the 13.5s are e rated. So not only width but much stiffer too. I'd go back and tell them give u the 12.5s you ordered.Just received my 2018 JL. Dealer installed the new ridgegrappler tires. I ordered 37x12.5x17. They put on 37x13.5x17. Jeep seems to road walk quite a bit. How much difference will the 1 inch in width make?
Well the 12.5s are d rated and the 13.5s are e rated. So not only width but much stiffer too. I'd go back and tell them give u the 12.5s you ordered.
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Thanks for the info. Dealership is a 7hr drive. Don’t want to make the trek unless I’ll see a significant difference.
https://jlwrangler.com/images/attach/jpg.gif
Love the look, would like a little better highway Tavel
Just received my 2018 JL. Dealer installed the new ridgegrappler tires. I ordered 37x12.5x17. They put on 37x13.5x17. Jeep seems to road walk quite a bit. How much difference will the 1 inch in width make?
Even 32 seems high. I run 30-32 for road use on my 315 duratracs, your grapplers should probably be in the 26-28 range for road use.
That sounds right to me. You can chalk test them, but 26 to 28 sounds close. I ran 32 in my 315 Duratracs. That’s about a 35” tire.
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please explain this chalk test to me
please explain this chalk test to me
Ridge grapplers vs Open Country are a tough compare as one is an aggressive AT vs the Toyo MT. I ran those Toyos and they were load range E not D. I thought the D was the 37x12.5 on the open country also.Ok, I've got a related question -
I've currently got Nitto Ridge Grapplers in the shop - 35x12.5r17s, load E. Going to jump up to 37s, though.
Anyone have thoughts on a 12.50 vs 13.50, and whether it's worth jumping from the Ridge Grapplers load E to Open Country load D, if I do decide to go the 13.50 route? Ride comfort, road noise, etc. are factors for me.
Option 1 - 37x12.50r17 Ridge Grappler, load D (thinking 12.50s might look a bit narrow for 37s)
Option 2 - 37x13.50r17 Ridge Grappler, load E (not sure about that E load...)
Option 3 - 37x13.50r17 Open Country, load D (top pick is Ridge Grappler, but how do these compare?)
Practically speaking, I'd guess that the 12.50 is better for me - most of my usage is on-road and off-road is only light usage. Plus, I'm in Ohio so I assume the narrower 12.50 would do better in snow.
BUT..... wider tires look awesome And I won't lie and pretend like the looks don't matter to me
Also - any other good 37x13.50r17 options to consider? I believe the STT Pros are available in this size with an E rating, but if I were going with the E rating I'd probably just stick with the RGs. So... any other 37x13.50r17s in D load?
Lastly - concerns with mounting 13.50s on an 8.5" wheel with 4.33" backspacing/-10 offset?
please explain this chalk test to me
Ridge grapplers vs Open Country are a tough compare as one is an aggressive AT vs the Toyo MT. I ran those Toyos and they were load range E not D. I thought the D was the 37x12.5 on the open country also.
I did like the wider tires which is why I got them back then when on 37s. That said I will never buy an E tire for a light Jeep again. I hated the ride. I ran like 20 psi in them just to make it semi ok. My view is it comes down to comfort vs look and that's really your call. I got ridge grapplers for my JL and got the 37x12.5 just to keep a D.
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Oh the open country R/T. My bad I thought u meant M/T. Those and the ridge grapplers came out at same time and its same parent company. I bet they are made in same plant and very similar in every aspect.Thanks, gecko! I’m nervous about the E load.
Here are the Open Country ones I’m looking at, looks like they offer 13.50s in load D now.
https://simpletire.com/toyo-37-13.50r17-350670-tires
They’re also marketing these as all-terrains... so I was thinking they’re a comparable tire to the RGs, in terms of class. Is that not correct?
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