KM2 35x12.5x17 Closeout? - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 35 Old 02-26-2012, 05:24 AM Thread Starter
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KM2 35x12.5x17 Closeout?

I was pricing out tires today on tirerack.com and they have the 35 12.5 17 KM2 listed as a closeout but not the other sizes.
Is BFG phasing out this size and replacing it with a 315x70/17?
Anybody know?
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post #2 of 35 Old 02-26-2012, 07:28 AM
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There have been a LOT of gripes that the KM2s aren't their advertised sizes. While we could hope BFG is replacing it a properly sized tire, if they're doing as you suggest the 315x70/17 will be closer to a true 34.

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post #3 of 35 Old 02-26-2012, 07:35 AM
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seems to be a popular tire to close out....hmmmm
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post #4 of 35 Old 02-26-2012, 10:36 AM
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Some tire companies just don't make ANY sense, look at Goodyear. The most expensive tire they make the MTR huge demand for them and there are none to be found, km2 35" one of the most sought after sizes and closing out??


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post #5 of 35 Old 02-26-2012, 12:18 PM
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My km2 measure properly...?


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post #6 of 35 Old 02-26-2012, 12:20 PM
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My km2 measure properly...?


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post #7 of 35 Old 02-26-2012, 02:20 PM
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Putting a ruler across the top and measure from the ground up, my 35's measure to 34.75


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post #8 of 35 Old 02-26-2012, 02:39 PM
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Here ya go


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post #9 of 35 Old 02-26-2012, 03:00 PM
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Here ya go


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This dudes dismissing the claims!! I love it....What PSI you running at? All KM2s I have seen run an inch and half smaller than advertised. But then again, all tires run small, there is no doubt about that, the KM2s run about 1/4 to 1/2 inch shorter than most though it seems. My 35x12.5x17 inch GY MTR'S w/K; mounted, and at 28 psi, measure out to be 34 inches. My 285/70R17 inch KM2s, (which is suppose to be roughly a 33 incher); I had prior measured out to be less than 32 inches.

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post #10 of 35 Old 02-26-2012, 05:10 PM
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Here ya go


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They do not appear to be mounted.
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post #11 of 35 Old 02-26-2012, 05:19 PM
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He is measuring them as BFG and all others do, no load. The deal is the BFG has soft side walls so when you measure them on the jeep they measure less.

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post #12 of 35 Old 02-26-2012, 05:44 PM
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It is mounted on a 17x9 wheel but not on the jeep, on the jeep with a load it is "shorter".

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post #13 of 35 Old 02-26-2012, 05:47 PM
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He is measuring them as BFG and all others do, no load. The deal is the BFG has soft side walls so when you measure them on the jeep they measure less.
Sitting next to an identically set up JKU with 37" MTRs, my BFG 37s are about an inch shorter.
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post #14 of 35 Old 02-26-2012, 05:48 PM
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Sitting next to an identically set up JKU with 37" MTRs, my BFG 37s are about an inch shorter.
This I have seen in the 35" flavor compared to an MTR+K and KM2

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post #15 of 35 Old 02-26-2012, 05:57 PM
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This I have seen in the 35" flavor compared to an MTR+K and KM2
I think when I origanally got my 35" KM2s they measured about 33.75" was and still am disappointed they were that short


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post #16 of 35 Old 02-26-2012, 05:59 PM
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Wonder how they measure under load at about 70 mph?
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post #17 of 35 Old 02-26-2012, 06:02 PM
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I think when I origanally got my 35" KM2s they measured about 33.75" was and still am disappointed they were that short
That is what my speedo had to be set on to be accurate when I first bought them. I was annoyed enough to not even measure them out. Couldn't have been too far from that.

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post #18 of 35 Old 02-26-2012, 06:05 PM
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about how much was your speedo actually off? I'm thinking about the pro cal. seems to run fine the way it is....but not quite sure of my speed and pretty sure the mpg is off.....
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post #19 of 35 Old 02-26-2012, 06:27 PM
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Am I reading these post wrong or are people arguing with a picture?

Once again, as the picture proves, with no load the tires are 34.75. When they have the weight of a vehicle on them the sidewall bulges out.

Of course, the speedo has to be corrected to a lower number according to the weight (load), air pressure, and perhaps a rim outside of the tire's range. The distance from the center of the axle/rim to the road is what matters for the speedo. This is why a low tire get less MPG (the purpose for the TPMs by the way) along with a slightly higher rolling resistance in effect a low tire lowers your final gearing.

If you want a 35" tire that stands taller find one with a stiffer sidewall.

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post #20 of 35 Old 02-26-2012, 06:41 PM
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Originally Posted by toymaster View Post
Am I reading these post wrong or are people arguing with a picture?

Once again, as the picture proves, with no load the tires are 34.75. When they have the weight of a vehicle on them the sidewall bulges out.

Of course, the speedo has to be corrected to a lower number according to the weight (load), air pressure, and perhaps a rim outside of the tire's range. The distance from the center of the axle/rim to the road is what matters for the speedo. This is why a low tire get less MPG (the purpose for the TPMs by the way) along with a slightly higher rolling resistance in effect a low tire lowers your final gearing.

If you want a 35" tire that stands taller find one with a stiffer sidewall.
No, you are right actually. For comparison sake...

I just measured my left rear 35x12.5x17 with 33psi on a factory 17x7.5" Moab wheel that has 40,000 miles on it using the same "level" measuring system. It measures right at 33" with 5/32" of remaining tread in the center. Now a brand new KM2 advertises as being 20/32 of tread depth.

Basic math says to add 15/32 to my 33" measurement should equal a brand new KM2? Right? Well that comes out to 33.5" with a little rounding up....we are a long way off the 34.8" advertised spec for the tire.

A D rated tire on a vehicle that came with C's and 33 psi is going to squat 1-3/8"? Come on...

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post #21 of 35 Old 02-26-2012, 06:47 PM
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No, you are right actually. For comparison sake...

I just measured my left rear 35x12.5x17 with 33psi on a factory 17x7.5" Moab wheel that has 40,000 miles on it using the same "level" measuring system. It measures right at 33" with 5/32" of remaining tread in the center. Now a brand new KM2 advertises as being 20/32 of tread depth.

Basic math says to add 15/32 to my 33" measurement should equal a brand new KM2? Right? Well that comes out to 33.5" with a little rounding up....we are a long way off the 34.8" advertised spec for the tire.

A D rated tire on a vehicle that came with C's and 33 psi is going to squat 1-3/8"? Come on...
33 + 15/32 + 15/32 = 34" will that tire squat 3/4"??? yes, it will. The sidewalls are very soft. Can be a pro or con which ever way you look at it.

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post #22 of 35 Old 02-26-2012, 06:53 PM
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33 + 15/32 + 15/32 = 34" will that tire squat 3/4"??? yes, it will. The sidewalls are very soft. Can be a pro or con which ever way you look at it.
Yep, you are right. I completely skipped adding the other half to it. The sidewalls are their downfall I suppose.

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post #23 of 35 Old 02-26-2012, 08:37 PM
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When I had the KM2 37s installed I had to reset the ECM with my Procal. At 30 psi they measured 35.5" from the ground to the top of the tire, which is how AEV has you take the measurement to plug into the Procal. The spare on my JK has never been on the ground. Measured on the carrier it's 36.25" across at 30 psi.
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post #24 of 35 Old 02-26-2012, 09:13 PM
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With my KM2 35s at about 9/32s I had to set my wheel size to 33.25 to get the speedo to be accurite. Although BFG claims 20/32 tread new, I have never been able to get them to measure out more than 19/32 brand new on 6 tires.

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post #25 of 35 Old 02-27-2012, 01:42 PM
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My 2-door's KM2's are 255/80 R17... tire calculators all put that size at about 33.3"

I was pleased as punch when I got them mounted... the unloaded/mounted spare measures over 33" with a tape measure (don't know exact fraction of an inch).

on the ground with weight of Jeep on them they measure 32.5" tall... 35 psi in all tires on stock Moabs...

I've always taken everyone's tire size bitching with a grain of salt... hardly anybody ever tells you how they measure them... mounted/unmounted, loaded/unloaded, air pressure, wheel width, etc...

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