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Old 06-09-2013, 09:10 PM   #1
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KM2 - Seasonal swap? extra wheels?

My situation:

JKU, stock height, stock wheels. Daily driver, about 75/25 city/highway. Offroad many but not all weekends.

NH, so we get snow, sleet, slush, ice mess to deal with.

I would like to move to 33x10ish pizza cutters. I don't seek out mud, though it isn't uncommon to get a bit slick with slight mud/organic debris here when offroad, and have no need for sand ability.

I don't see going to 35 or bigger for at least two years, likely longer.

I am looking at BFG KM2 in 255/80R17.

My dilemma, due to zero experience with the KM2s is how to prepare for winter driving (and to a lesser degree wet pavement).

Options as I see it:

A.) Move to the KM2, leave them on all the time (which is what I'd like to do, but have gotten the impression that the KM2 aren't as good in winter or wet pavement conditions as the OEM SRAs or winter specific tires)
B.) Buy KM2 as my 'spring/summer/fall' tire, have someone swap and rebalance at the beginning and end of winter (so twice yearly labor cost) - and when the SRAs wear out, get something winter specific, Blizzack perhaps.
C.) Get another set of wheels and TPMS sensors, and swap for the KM2 myself on those weekends I'm going to go offroad. Of course this means the impromptu offroad trip is that much more hassle to prepare for. Obviously this will be higher initial cost (I know people say '15s pay for themselves with lower priced rubber and cheap wheels' - but I just don't see that much difference in price [255/80R17 at DTD is showing $253ea, 33x10.5x15 at DTD is $217ea - so $36/tire, which won't pay for an aluminum alloy wheel and TPMS sensor]).

Aside from cost, which is straightforward to compare, am I making too much out of the other compromises? Which things are likely to drive me nuts? Are there other factors I'm not considering? Is there a different tire that will work well on rocks, in close to the 33x10 size, that I should be considering?

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Old 06-09-2013, 10:18 PM   #2
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Option C would suck. I had the KMs and they are not siped, so predictably bad in icy and snowy conditions. It is really the braking that is bad. The MTR Kevlars seem to be quite a bit better. If you have the room, Option B would be my recommendation of all your options. That is what I was about to do but I wanted C rated 35s and MTR were available in that size/rating. They are a bit stiffer than the KM2s due to the Kevlar sidewalls but they are great offroad (KMs/KM2s are too) and do better in the snow/ice. Check those out, as well as other options like DuraTracs, MTZs, STTs....

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Old 06-10-2013, 05:53 AM   #3
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I like the idea of the MTR/K, but people that I wheel with say they are much too stiff to really wrap around rocks, even when aired down. They also don't seem to be available in 33x10.5x15 or 255/80R17

I also like the DuraTrac - but again, don't seem to get to the pizza cutter size. Unless I'm looking in the wrong place (looking on manuf pages for the tires at their tire/size specs charts) this seems to be a problem with MTZ and STT.

Going to 33x12.5 (ish) seems to definitely be the way to open up more options in available tires, but I'm sold on the pizza cutter theory Expeditions West: Tire Selection for Expedition Travel.

Garage space to store a set of tires isn't really a big problem for me.
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Old 02-12-2014, 02:30 PM   #4
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Quote:
Originally Posted by Ivoryring View Post
I like the idea of the MTR/K, but people that I wheel with say they are much too stiff to really wrap around rocks, even when aired down. They also don't seem to be available in 33x10.5x15 or 255/80R17 I also like the DuraTrac - but again, don't seem to get to the pizza cutter size. Unless I'm looking in the wrong place (looking on manuf pages for the tires at their tire/size specs charts) this seems to be a problem with MTZ and STT. Going to 33x12.5 (ish) seems to definitely be the way to open up more options in available tires, but I'm sold on the pizza cutter theory Expeditions West: Tire Selection for Expedition Travel. Garage space to store a set of tires isn't really a big problem for me.
What did you end up deciding here? I have a 2014 JKURX on order and am considering the KM2 255/80r17 but am concerned about the E rating and snow/rain performance.
I really like the look of the tires, although I'm leaning towards adding 1.5" spidertrax spacers purely for added stance and stability.
Also, I will definitely be adding the 1.5 Teraflex leaving kit as soon she gets delivered.
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Old 02-12-2014, 03:25 PM   #5
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I haven't decided. I'm still on my original SRAs (and not babying them). I've added bumper and heavy skid plates - so I'm definitely riding lower than ever.

If money was no issue, I'd just go to 35s (truss the axles, 2.5" lift, flat fenders, maybe big brake kit). If I get 33s now, I won't go to 35 until they are worn down.
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Old 02-20-2014, 12:14 AM   #6
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Quote:
Originally Posted by Ivoryring View Post
My situation: JKU, stock height, stock wheels. Daily driver, about 75/25 city/highway. Offroad many but not all weekends. NH, so we get snow, sleet, slush, ice mess to deal with. I would like to move to 33x10ish pizza cutters. I don't seek out mud, though it isn't uncommon to get a bit slick with slight mud/organic debris here when offroad, and have no need for sand ability. I don't see going to 35 or bigger for at least two years, likely longer. I am looking at BFG KM2 in 255/80R17. My dilemma, due to zero experience with the KM2s is how to prepare for winter driving (and to a lesser degree wet pavement). Options as I see it: A.) Move to the KM2, leave them on all the time (which is what I'd like to do, but have gotten the impression that the KM2 aren't as good in winter or wet pavement conditions as the OEM SRAs or winter specific tires)
I have the 265/70R17 KM2's and was perfectly happy with them this winter in the snow/ice and wet this winter. They performed much better than I expected after reading about them here. I kept my SRA's and was planning on buying another set of wheels for a winter swap back to the stockers, but now I'm selling the SRA's. No reason to keep them around, the KM2's worked well. I used to swap snow tires onto my previous sporty cars in the winter, and the KM2's are definitely not snow tires, but they were perfectly acceptable.
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Old 02-20-2014, 05:09 AM   #7
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I have the 265/70R17 KM2's and was perfectly happy with them this winter in the snow/ice and wet this winter. They performed much better than I expected after reading about them here. I kept my SRA's and was planning on buying another set of wheels for a winter swap back to the stockers, but now I'm selling the SRA's. No reason to keep them around, the KM2's worked well. I used to swap snow tires onto my previous sporty cars in the winter, and the KM2's are definitely not snow tires, but they were perfectly acceptable.
That's really useful feedback schiesz - thanks! Just like you, I've been assuming from reading here on WF that KM2s are not much better than slicks when it comes to the snow/ice/wet.
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Old 02-20-2014, 05:13 AM   #8
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Originally Posted by Ivoryring View Post

That's really useful feedback schiesz - thanks! Just like you, I've been assuming from reading here on WF that KM2s are not much better than slicks when it comes to the snow/ice/wet.
The biggest problem I run into in the snow is, if your speed is slow snow and ice can fill in the tread and basically make it a slick. On road I never had a problem with them.
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Old 02-21-2014, 12:49 AM   #9
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I have been running KM2's on my 10A all winter in CT and they have been perfectly fine.
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Old 02-21-2014, 05:58 AM   #10
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I'm running 35" KM2's in northeast MA. I haven't had any issues with them. I was surprised to read how some people feel about them on here because I think they work well. (Btw. If you're thinking about 35's. Get them.)
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Old 02-24-2014, 04:01 AM   #11
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As you can tell from the posts the KM2s do just fine in some snow conditions but when it gets really icy on the road the only thing that can improve traction is more griping edges via siping. Unfortunately the KM2s have no siping. The MTR and the MTR/K have some siping but the Duratracs have more abundant siping.
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Old 02-25-2014, 01:42 PM   #12
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I'm running the stock KM's (don't think they are KM2) 255/75/17 and have had no issues this winter. I think it also has to do with how you drive with what you have.

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Old 02-25-2014, 03:33 PM   #13
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I'm running the stock KM's (don't think they are KM2) 255/75/17 and have had no issues this winter. I think it also has to do with how you drive with what you have. Bob
Completely agree that traction is a direct function of driving ability. That said, driving without dedicated snow tires is like using a small wrench for a tight bolt; it can be done but using the right tool for the job is always preferable if you have it. If you can afford to have two sets of tires/wheels do it for stopping power alone.

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