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Old 05-15-2017, 07:46 PM
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BF Goodrich KO2 or KM2

Putting these on a 97 TJ. Looking at 33's. Won't do much offroading. Mainly driving around and drive on the beach. I do live up north, so may need to deal with snow, but this is not my everyday vehicle.

Any opinions on either?
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Old 05-15-2017, 07:52 PM   #2
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If you need to deal with snow and sand I think the KO2s would be a good option. They would handle the snow/rain/ice better and would keep you on top of the sand without digging down.

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Old 05-16-2017, 09:29 AM   #3
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On my JK I am finding that the KO2's are wearing better than the KM's. I ran the KO2's last winter and they were comparable to the Nokian's that I put on her JKUR. I would not want to try icy roads with a mud tire.
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Old 05-16-2017, 11:05 AM   #4
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I run the KM2s on the beach here in Wilmington with out any issues. I have never had the KO2 to compare to, but I expect they may be quieter on road and I see on other jeeps they do well in the sand also.
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Old 05-16-2017, 12:27 PM   #5
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I have had a great experience with my KO2's

04 TJ with 30X9.5X15 tires

Good traction and good mpg (Over the sierras in a whiteout and ice/snow mix / 27 mpg at 70 mph)
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Old 05-16-2017, 05:53 PM   #6
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Have you considered the Goodyear Duratrac? I have them on my 120 series Toyota, great on the road, fairly quiet and a beast of a tire in the snow.
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Old 05-16-2017, 06:17 PM   #7
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Quote:
Originally Posted by jameslee97206 View Post
Have you considered the Goodyear Duratrac? I have them on my 120 series Toyota, great on the road, fairly quiet and a beast of a tire in the snow.
One thing to note is if you wheel on rocks the Duratrac may not be a good option. They only have two ply sidewalls that aren't as puncture resistant as other options out there. Could be a moot point but for me I would like the added comfort of three ply sidewalls
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Old 05-16-2017, 06:29 PM   #8
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One thing to note is if you wheel on rocks the Duratrac may not be a good option. They only have two ply sidewalls that aren't as puncture resistant as other options out there. Could be a moot point but for me I would like the added comfort of three ply sidewalls
This is true and I wouldn't run them on my TJ. Doesn't sound like the OP has a rock rig, might be a good tire for him.
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Old 05-17-2017, 12:49 PM
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This is true and I wouldn't run them on my TJ. Doesn't sound like the OP has a rock rig, might be a good tire for him.
What's a rock rig? New to jeeps
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Old 05-17-2017, 12:52 PM
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So, I'm leaning towards the KO2 for a smoother ride. So I'm looking at getting 33X10.5X15 and match with a 2.5" or so lift. How does that sound? I will be doing very little, if any off roading other than beach.
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Old 05-17-2017, 01:06 PM   #11
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What's a rock rig? New to jeeps
A slang term describing a Jeep or vehicle that while off roading primarily sees rocks.
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Old 05-17-2017, 01:21 PM   #12
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Originally Posted by horns78232 View Post
So, I'm leaning towards the KO2 for a smoother ride. So I'm looking at getting 33X10.5X15 and match with a 2.5" or so lift. How does that sound? I will be doing very little, if any off roading other than beach.
What kind of Jeep do you have?

If you have a Jeep with the Dana 35 rear end you may want to consider skipping on the 33s. First off, if you aren't geared properly your Jeep will not perform very well. Secondly, the D35 rear end isn't very strong and with 33s you are about at its limits. If you don't need the 33s then maybe you'd be better off with 31s.

Also, for 33s the minimum lift you need is somewhere around 3".

Provide us with more info if you can, especially about your axles, axle gear ratios, what engine you have, and what transmission you have
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Old 05-18-2017, 12:10 AM   #13
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Looking at the 315-70-17 KO2's in load range C. Looking for a better ride than my Toyo RT's 10 ply, 295-70-17. I really don't like rocks. What do ya think?
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Old 05-18-2017, 09:23 AM
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What kind of Jeep do you have?

If you have a Jeep with the Dana 35 rear end you may want to consider skipping on the 33s. First off, if you aren't geared properly your Jeep will not perform very well. Secondly, the D35 rear end isn't very strong and with 33s you are about at its limits. If you don't need the 33s then maybe you'd be better off with 31s.

Also, for 33s the minimum lift you need is somewhere around 3".

Provide us with more info if you can, especially about your axles, axle gear ratios, what engine you have, and what transmission you have
It is a Dana 35. I'm not sure on axle, axle gear ratio. I tried to find the stamp and I can't see it. Previous owner sprayed an undercoat, and I assume that it's covered. It is a 4cyl and manual.

I will not be off-roading at all. This is more for looks. I will drive it on the beach where I live, and some roads may get bumpy, but no rocks.
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Old 05-18-2017, 09:44 AM   #15
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It is a Dana 35. I'm not sure on axle, axle gear ratio. I tried to find the stamp and I can't see it. Previous owner sprayed an undercoat, and I assume that it's covered. It is a 4cyl and manual.

I will not be off-roading at all. This is more for looks. I will drive it on the beach where I live, and some roads may get bumpy, but no rocks.
Your Jeep came with 4.10s from the factory. When you can, tell us what RPM you are running at a specific speed in a specific gear (preferably 4th or 5th gear). We can then tell you exactly what ratio you are running. We also need to know the tire size you are running now to accurately figure out which ratio you have.

The Dana 35 is a weaker axle, but paired with the 2.5L it should be able to handle the 33s, especially with the type of driving/wheeling you will be doing. Your 2.5L is under-powered and without the proper gear ratio running the 33s will make your Jeep REALLY sluggish... Even 31s may be unbearable. You may want to consider a gear ratio change so that you don't lose on road performance otherwise you can damage your engine/transmission, drop your MPGs, and you will constantly be downshifting to keep up on the highway. From the factory the SE came with 205/75R15s with 4.10 gearing. So to keep the same performance as stock you would want:

4.56 gears for 31" tires
4.88 gears with 33" tires

I know it probably isn't what you want to hear but that really is the reality of it. They say "if you want to play you gotta pay" and it really is true... Some people get by without regearing by sticking in 4th gear on the highway instead of 5th but that is less than ideal. I can attest to this as my Jeep used to have 3.07 gears with 31" tires (I have the 4.0L). It was an absolute slug and in 6th gear I wouldn't be able to maintain my speeds even on flat ground. I regeared in February to 4.10s which was the proper ratio for my sized tires and the difference was astounding. I can easily keep up on the highway now and I can even accelerate in 6th, uphill, into a headwind! It made a HUGE difference and was honestly the best money I have spent so far on my Jeep.
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Old 05-19-2017, 09:07 AM
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At about 40 MPH and in 4th, it's at 2000 RPM's. At about 30 MPH and in 3rd, it's about 2000 RPM's. Tires are P235/75R15. I live on an island at the highest posted speed limit is 45, but the jeep very rarely gets to 40 when driven.
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Old 05-19-2017, 10:28 AM   #17
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At about 40 MPH and in 4th, it's at 2000 RPM's. At about 30 MPH and in 3rd, it's about 2000 RPM's. Tires are P235/75R15. I live on an island at the highest posted speed limit is 45, but the jeep very rarely gets to 40 when driven.
Yep, you still have the stock 4.10 gearing. Here's the deal... You could try the 33s if you are absolutely set on that. Since it is a toy vehicle and won't be used much you may not mind the sluggish feeling. Lugging your engine and transmission isn't a great thing for it, but in the end it is your decision. Like I said, you may not mind it but I just want you to be aware that a regear may be necessary if you decide to upgrade to 33s. 31s should be ok on that gearing though. It isn't totally ideal but for something that you will just be cruising around in it should be fine.
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Old 06-06-2017, 12:19 PM   #18
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I recently replaced my old BFG KM's with the new KM2's and they suck in mud! They might as well be an all terrain because they do not clean out, they load up and turn into slicks. Other than that they seem like good tires, they ride nice they balanced well they are not very loud on pavement. They do get small rocks stuck in the narrow slits of the tread and will not come out which is another thing i absolutely hate about them. They are probably better suited to rock crawling but i wouldn't know because my state don't have rocks to crawl on. But if you are looking for a tire that does well in mud buy something else this tire just simply does not work in mud.
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Old 06-09-2017, 09:38 PM   #19
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I've run KMs, KM2s, and now KO2s on my JKU. KM and KM2 both cupped pretty bad. Only got maybe 25K miles out of each set before replacing. The KM was terrible in the snow. Didn't get enough snow to evaluate the KM2. The cupped KM2s were insanely loud - could not carry a phonecon through the Uconnect with the windows closed (ragtop). So far I'm loving the KO2s. Also ran duratracs on my old TJ. Ended up having to replace 2 due to sidewall damage within a year (ok, one of these was sliced in a watercrossing while offroading).

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