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Old 11-27-2012, 08:42 AM   #1
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BF Goodrich MT KM or Cooper AT/3

Need some input, I'm looking to upgrade my tires on my Stock 2012 JK Sport. Keeping the 17" wheels on but what to get rid of the Goodyear SRA's. I have the opportunity to upgrade to the stock rubicon wheels and tires from a buddy of mine, only 40 miles on them.

Living in Northeast where snow and rain are prevalent in the Winter, I am hesitant to get mud terrains, as this is a daily driver 90% of the time. The salesperson at Mavis told me to go with the Cooper AT3's and every review I have come across has said good things.

The price point is almost identical between the two tires, I am just torn. I love the look of a MT tire but is it functional for everyday driving? Is the look of the Cooper AT3 aggressive or is it identical to my current tires, Goodyear SRA?

I don't think I will be doing a suspension lift anytime soon, so I'm sticking with basic wheel and tires for now.

Any input would be greatly appreciated.

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Old 11-27-2012, 09:08 AM   #2
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apples to apples
you need the cooper st maxx to get the same aggressiveness as the km.
the at3 is an all terrain the km is a mud terrain.
both are better than the sra but the all terrain will fail in the mud. i just avoid mud and run the cooper atp which is very similiar to the at3



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Old 11-27-2012, 09:31 AM   #3
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Are you running the ATP on yours in these pics?
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Old 11-27-2012, 09:33 AM   #4
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yep. those are cooper atps. very happy with them.
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Old 11-27-2012, 09:35 AM   #5
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They look great! Thanks for your help, just wondering if I need backspacing now since I'm using my stock 17" wheels?
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Old 11-27-2012, 09:40 AM   #6
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my backspacing is 5.2 which is slightly further out than stock but not much. if you go with 285 70 17 its only 3/4 of inch closer than your factory tires. try it. if it rubs adust your steering stops of pick up spacers.
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Old 11-27-2012, 10:03 AM   #7
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I'd say the ST Maxx is comparable to a Duratrac, the STT more like the KM. At any rate, all-terrains are way, way better than mud terrains for winter driving with the exception of deep snow.
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Old 11-27-2012, 10:35 AM   #8
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I know they are completely separate tires but at the end of the day would you go with MUD TERRAIN or ALL TERRAIN? Take into account, its a daily driver, some trails. I am leaning toward the ALL TERRAIN but I want the aggressive look in my tires.
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Old 11-27-2012, 10:49 AM   #9
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DD for you? Live in NE with wet roads/snow/ice? Sounds like AT to me. Or leave the stockers on in winter and run muds when the snow melts.

Or an aggressive AT...duratracs, st maxx, nitto trail grapplers.
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Old 11-27-2012, 10:56 AM   #10
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DD for you? Live in NE with wet roads/snow/ice? Sounds like AT to me. Or leave the stockers on in winter and run muds when the snow melts.

Or an aggressive AT...duratracs, st maxx, nitto trail grapplers.
I run BFG AT in winter and BFG KM in summer. Love 'em both for their respective usage.

One option if you are really concerned about mud is to use AT's and carry tire chains. Chains are pretty effective in mud.
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Old 11-27-2012, 11:02 AM   #11
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Quote:
Originally Posted by County98 View Post
DD for you? Live in NE with wet roads/snow/ice? Sounds like AT to me. Or leave the stockers on in winter and run muds when the snow melts.

Or an aggressive AT...duratracs, st maxx, nitto trail grapplers.
I agree. Especially if your buddy will sell his set of rubi's for 4 or 500. I happen to love the bfg m/t. Im on my second set after trying out duratracs, procomp x-terrain's, and bfg a/t's in between. Im in FL so i don't have to worry about snow, but to me, the noise and ride on the bfg m/t's is very comparable to the duratracs. And im comparing 30" dura's to 32" bfg m/t's. The bfg's just look a lot better to me.

One thing is for sure though; you must toss the sra's. They are hurting your Jeep's feelings.
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Old 11-27-2012, 11:03 AM   #12
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Thanks for input. Problem I'm facing, I can get 5 brand new wheels and tires, BFG KM, for less than 5 Cooper AT3s installed. I'm leaning more toward the KM now based on price alone.
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Old 11-27-2012, 11:09 AM   #13
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At this point I can't even give these SRA's away.
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Old 11-27-2012, 11:59 AM   #14
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I have KM2s. They are noisy- much more so than the original KMs we had on a truck. I am used to it and some people in fact like a "hum" but ATs will be quieter. I also have a soft top so that amplifies the sound I am sure.
I don't know the Cooper tire- but you typically will have a ride difference between any AT and an MT. When we swapped the old BFG KMs on our truck for BFG ATs- the difference was readily apparent. An AT will typically ride softer in comparison to a stiffer side wall MT. Unfortunately we want our truck to ride like a truck- and we dislike the ATs. But it depends on your personal preference- if you want a more "car like" or "truck like" feel. (Yes; I know; its not a car; example for reference only- no kittens have been killed) I82 has both ATs and MTs on a Jeep- so I don't know if he has the same experience.
Keep in mind that tires are a huge part of your ride- I wouldn't pick them based on price. If you hate your tires- you'll feel it every day you drive it. I hated the KM2s at first- I was considering selling them as soon as I put them on. But once they wore in a little and I got them out on trail and rock- I am happy.
That said ESP has had every tire known to man and I am pretty sure he's had Coopers and KMs. If he doesn't chime in here you can PM him. He's very helpful.
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Old 11-27-2012, 12:15 PM   #15
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Hi from Sweden.

I bought the cooper st maxx 265/70/17 and Iam happy with them. My jeep look so cool with them.

I bought them as a wintertire and it is approved as a wintertyre in Sweden, with not appoved wintertyre I will get a fine. And Jeep original tyre is forbidden in Sweden wintertime.

This is my first aggresive 4x4 tire and I was affraid that it would sound much, I hardly notice them, super great.

It is a E-tyre but I think they give me a great ride. My girldfriend did not notice that I changed tire, maybe a small hum but that is probably because they are studded.

I wanted 285/70/17 but I did not want a lift and spacers and such. And steering stops affects turning circle.

Black Rock Yuma rim 17" with 4.5 in back spacing.





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Old 11-27-2012, 07:22 PM   #16
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I have the AT3's in 285/70/17 and I love them.

Great traction and very quiet. My Jeep is also my DD and I didn't want something noisy.



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Old 11-27-2012, 07:43 PM   #17
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Quote:
Originally Posted by JeepHerz View Post
I have KM2s. They are noisy- much more so than the original KMs we had on a truck. I am used to it and some people in fact like a "hum" but ATs will be quieter. I also have a soft top so that amplifies the sound I am sure.
I don't know the Cooper tire- but you typically will have a ride difference between any AT and an MT. When we swapped the old BFG KMs on our truck for BFG ATs- the difference was readily apparent. An AT will typically ride softer in comparison to a stiffer side wall MT. Unfortunately we want our truck to ride like a truck- and we dislike the ATs. But it depends on your personal preference- if you want a more "car like" or "truck like" feel. (Yes; I know; its not a car; example for reference only- no kittens have been killed) I82 has both ATs and MTs on a Jeep- so I don't know if he has the same experience.
Keep in mind that tires are a huge part of your ride- I wouldn't pick them based on price. If you hate your tires- you'll feel it every day you drive it. I hated the KM2s at first- I was considering selling them as soon as I put them on. But once they wore in a little and I got them out on trail and rock- I am happy.
That said ESP has had every tire known to man and I am pretty sure he's had Coopers and KMs. If he doesn't chime in here you can PM him. He's very helpful.
Well ... I have the E rated BFG AT KO 265/70r17 for winter and the stock Rubi KM's for summer, which are C rated. I hardly notice a difference. I got the E rated AT's for puncture resistance. Probably overkill, really.

That said I think JeepHerz is correct -most AT's probably give a little better ride than an MT. Keep in mind that what qualifies as an "all-terrain" is an awfully broad range of tires, anything from something like a Duratrac or ST Maxx that is almost an MT (large voids) to a Pirelli Scorpion which has pretty small voids, almost like an all-season.
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Old 11-27-2012, 07:57 PM   #18
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I have a rubicon so I'm running the stock BFG KM's and I personally really like them. They are (in my opinion) really quiet for a mud tire, wear well with good rotation, and are great offroad. I'm in FL so no snow issues, but these things kill it in swamp and mud. I'll probably get another pair. For reference I have about 14,000 miles on mine.

Everyone says amazing things about the duratracs, you might want to look at those as well. I personally just don't want to get smaller tires (265's) or worrying about rubbing/backspacing with 285's since they don't come in the 255/75 size.

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