37" KM2s and 2DR
JK Super Freak
Joined: Aug 2009
Posts: 1,314
Likes: 1
From: Stamford, CT
I have 37" Toyos and using the Superchpis to plug in my tire size to get my speedo accurate. After trial and error, I had to dial in my tire height to 35.25" which surprised me. I'll have to take an actual measurement to see what I get for physical size. Parked next to a 37 Km2, Toyos look bigger.
JK Newbie
Joined: Mar 2011
Posts: 73
Likes: 0
From: indland empire, Ca
My buddy has 37" km2s on his 2 door and I have the procomp xtreme mt 37. We both have the exact same lift and almost same armor and bumpers and his tires look smaller next to mine. His neasure 36.9 i believe No prob balancing either tire and his rides nice. They have a little noise though. Hope this helps.
Thread Starter
JK Junkie
Joined: May 2008
Posts: 3,386
Likes: 0
From: North Alabama
Tire sidewalls loosen up after use with heavy loads or off road at low psi. With a 2 dr, unless you like a stiff ride, you want load range C or D tires, and you want to avoid load range E tires.
The Cooper STTs are also a great 37x12.50R17.
The Goodyear MTR w/Kevlar at least starts out taller than most 37s. However, after the sidewalls break in, I don't know if that difference continues to be as large. Plus, the MTR w/Kevlar tires are know for some inconsistency in balancing issues.
The Cooper STTs are also a great 37x12.50R17.
The Goodyear MTR w/Kevlar at least starts out taller than most 37s. However, after the sidewalls break in, I don't know if that difference continues to be as large. Plus, the MTR w/Kevlar tires are know for some inconsistency in balancing issues.
The Toyos are a wider tire in a 37 than the KM2 which may partially explain the difference in appearance. Wish they didn't weigh like 20+ lbs more per tire than the KM2 (although I've never heard of anyone having sidewall punctures with the Toyos - same can't be said for the KM2s).
My buddy has 37" km2s on his 2 door and I have the procomp xtreme mt 37. We both have the exact same lift and almost same armor and bumpers and his tires look smaller next to mine. His measure 36.9 i believe No prob balancing either tire and his rides nice. They have a little noise though. Hope this helps.
Thread Starter
JK Junkie
Joined: May 2008
Posts: 3,386
Likes: 0
From: North Alabama
Thanks for the clarification.
Received another height input, this from a friend running 37" KM2s on his 4DR - 36.75" off the vehicle and 36.25" mounted on his Unlimited. Interesting, as I would have guessed that the extra weight of the 4DR would have had a greater affect in "decreasing" size. Suspect it is as many have stated - combination of air pressure, rim width, and probably wheel size (i.e., 15, 16, 17, . . . inch).
Maybe I should have asked if anyone has measured less than 36 inches, and if so, in what configuration?
Received another height input, this from a friend running 37" KM2s on his 4DR - 36.75" off the vehicle and 36.25" mounted on his Unlimited. Interesting, as I would have guessed that the extra weight of the 4DR would have had a greater affect in "decreasing" size. Suspect it is as many have stated - combination of air pressure, rim width, and probably wheel size (i.e., 15, 16, 17, . . . inch).
Maybe I should have asked if anyone has measured less than 36 inches, and if so, in what configuration?
JK Enthusiast
Joined: Oct 2010
Posts: 495
Likes: 0
From: Dallas, TX
From reading this thread it seems the consistent message is all tires are measuring (once mounted and on the vehicle weighted down) anywhere from 1/2 to 1 inch less than advertised, which to me makes all the sense in the world. Manufactures measure them under no load, high point.
And, don't forget that alot of these heavy duty tires have really thick, tall, threads, which wear quickly, thus melting down their overall diameter over time. Take 1/4" of thread off and the tire just lost 1/2" in height.
Never heard about sidewalls weaking over time and allowing the tire to be lower, although I only spendt two years in quality control at a tire manufacturing plant inspecting over 2,000 tires per night plus spending time in the lab performing countless other tests... but never heard this before.
And, don't forget that alot of these heavy duty tires have really thick, tall, threads, which wear quickly, thus melting down their overall diameter over time. Take 1/4" of thread off and the tire just lost 1/2" in height.
Never heard about sidewalls weaking over time and allowing the tire to be lower, although I only spendt two years in quality control at a tire manufacturing plant inspecting over 2,000 tires per night plus spending time in the lab performing countless other tests... but never heard this before.
Thread Starter
JK Junkie
Joined: May 2008
Posts: 3,386
Likes: 0
From: North Alabama
I really like the 37" KM2s and the Cooper STTs. They are smooth. They perform great on and off road. They don't take much to balance. They last a good amount of miles.
I would have no hesitation running the 37" MTR w/Kevlar, but availability is spotty and production quality is sometimes inconsistent. I read a recent magazine article where the writer ordered several different tires in 37s for a test. Before mounting them, they weighed each tire. I seem to remember that the MTRs have one of the larger variations in weight between the 4 MTRs they received. Don't recall exactly the amount. The MTRs are known to sometimes have balance problems. They are also one of the highest rated tires in tests for all around performance.
So, if you order the MTRs, they will run larger than other brands, they may be hard to find, and you may possibly end up sending one or two back for an exchange. If you are willing to deal with that hassle, you would not regret the MTRs at all.
I would have no hesitation running the 37" MTR w/Kevlar, but availability is spotty and production quality is sometimes inconsistent. I read a recent magazine article where the writer ordered several different tires in 37s for a test. Before mounting them, they weighed each tire. I seem to remember that the MTRs have one of the larger variations in weight between the 4 MTRs they received. Don't recall exactly the amount. The MTRs are known to sometimes have balance problems. They are also one of the highest rated tires in tests for all around performance.
So, if you order the MTRs, they will run larger than other brands, they may be hard to find, and you may possibly end up sending one or two back for an exchange. If you are willing to deal with that hassle, you would not regret the MTRs at all.
Will take a look at the Cooper STTs. Anyone know if they (37s) tend to run true to size?
Thanks again for the detailed inputs Anthony.
JK Freak
Joined: May 2010
Posts: 677
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From: Missoula, Montana, United States
I've had 37" MTR's for about a month now and they have been awesome so far! After talking with the guys at the tire shop how hard they were to balance they told me they didn't require much at all. I can't remember the exact amount but so far I haven't had to take them back in to get them
rebalanced or anything. They are wearing great as well..still look like the day I got them
rebalanced or anything. They are wearing great as well..still look like the day I got them