Reviews: BF Goodrich 33x12.50R20 Tire, Mud-Terrain T/A KM3 - 38937

I have these ties on my '18 Ram 1500 EcoDiesel in 12.5x33R17. I've had these tires for a year now and put 32,000 miles on them. I've driven them on every type of terrain from hard-ball pavement (wet and dry), mud, snow, ice, gravel and everything in between. These tires have tackled everything beautifully and do especially well in mud and fresh snow (kind of a given). On ice they're great, but slide a bit. On the road they are more quiet than other mud terrains, but of course have some tire whine. The wear rate on these tires is outstanding! Like I said, I have 32k miles on these and they're still at about 50% tread left. Fuel mileage dropped significantly (26.8 mi/gal freeway down to 22.1 mi/gal) but that's too be expected. I would recommend these tires to anyone.

I've had these for about 10,000 miles now and they still look new. I came from 285/70/17 KO2's in E load range on my 4Runner, and I've got the same size and also E load of these now. I had the KO2's for 60,000 miles and would absolutely recommend those to anyone who is on the fence about them. But, for what I use my vehicle for, I decided to try mud terrains on my daily driver. I was very anxious about that, and oh man. These tires are perfect. They ride smoother than my previous tires, and somehow my road noise is a bit less also. They are fantastic on road, but off road is a night and day difference. I absolutely love these tires. I would 100% recommend.

I bought these KM3’s 2 months ago. So far they have been in the snowy mountains, icy pavement, heavy rain downpours on the highway, deep mud, and just recently sand. I have ran them at 50 psi with no sway and they absorb bumps well at speed. After 5k miles I project them to reach 65k miles... but that is a very very early projection. Anything over 50k miles and there is no competition in the mud terrain tire category.

have a set of 35x12,5r17LT on my F-150 was slightly concerned about road noise but they are extremely quiet. Amazing traction in mud and rocks. not as good as the Ko2s in snow but definitely not an issue driving through hard packed snow.

I have had these KM3s on the Interstate then straight onto the Continental Divide Trail. These tires have been amazing. Compared to the KM2s these tires are much quieter on the road and off road performance is so nice too. I'm going to be putting a set on my '58 Jeep FC150 also!

I've always had BFGoodrich All-Terrain tires and have always been very pleased but I decided to give the new KM3 a try. I couldn't be any more pleased! These are by far the quietest and best riding mud tires I've ever had heard or rode with. Once in Montana I drove my truck through many different conditions ranging from sticky mud, slick mud, Ice and snow. I honestly put myself in a few predicaments that I shouldn't have and every time these tires made up for my questionable decisions. BFGoodrich has set the bar pretty high with this new tire and I probably owe them dinner for getting my truck back home.

Spent a week driving the new Jeep Wrangler JL with the new 35” KM3. Recommended psi is 40 I believe or at least that what psi was in them. At 40 a little hard & noiser. Dropped to 32 psi & loved the ride & noise was not an issue. Is did tread to surface test & had full tread coverage. Did some off road running tires @15 & had fantastic traction!

I used to have K2s before I got my 285X70R17 KM3s. Here are some differenced I have observed: The KM's are noticeable wider than the KM2s. I did not measure the width of my KM2s, but I had to cut the stops on the tailgate for the spare tire on my Jeep JK by about 3/8" for the tire to fit onto the spare tire holder. So I would say the KM3s I have are about 3/4" wider on the sidewall than the same size KM2s I replaced. This is not a complaint - I just thought I would share my observation. The KM3s feel "squishy" compared to the KM2s. I am running them at the same 37 psi as the KM2s. The "squishy" feeling is very noticeable on turns and the Jeep rolls much more than it used to. The steering response also seems to be diminished. When I make a sharp turn, there is a very brief, but noticeable delay in the vehicle responding, and when it does, it feels like it is grabs. The KM3s have a different noise than the KM2s. The KM3s have a higher pitched hum than the KM2s. This higher pitched hum is mildly annoying. I have read that the tires get noisier over time. Hopefully, the noise will not increase too much. I realize these tires are more intended for off-road use as opposed to highway or city driving. I have not tried them on the trail yet.

I have had the mud snow tires (31x12 x15) on my 1989 Sidekick and love them. They air down to 12PSI and take me where ever I need or want to go. They grip well off road on rocks but I try to not drive on the sidewalls, yes they are thinner but that makes them flex and grip well. Even in snow and ice they grip and handle better than any other tires that I have tried. I am getting a Jeep Rubicon and these will be one of the first things that get installed.

I bought these for my 2017 Colorado ZR2 in 285/70/17 (E load) when they first came out in June of 2018. Overall, I got 66,000 miles out of them. They could have gone another 5k miles or so, but I believe I potentially got a slightly defective tire, as it has worn unevenly and is not perfectly round. Thus, there is now too much vibration to continue driving on this set. The other three tires in the set have worn and performed perfectly. The worst of the tires is pictured below. I always rotated the tires during oil changes. However, I elected to live with the “bad” tire and it was fine. It only became a problem in the last month due to the vibrations in the cab and steering wheel because of the imperfect shape. This was a very early set of KM3s so I’m not upset or surprised by this, as I think it is bound to happen. I took these tires to MOAB and on other off-road trails and they were very tough and had great traction. I’m giving 4 stars because the on-road ride quality leaves a bit to be desired, between the noise and vibration I experienced. I have since moved from CA to CO and need better snow traction. So I swapped out the KM3s for KO2s. Sticking with BFGoodrich!!! Don’t let my story stray you from these tires. Overall, they were awesome! I just have different needs now. I would also recommend a C load rating if you drive a smaller vehicle like mine. The E was a bit stiff for my truck (running at 38 psi).

I bought 35x12.50r17 almost a year ago. Two tires wore out horribly and uneven. The other two are half tread or better. I installed all new suspension in shocks a month prior to installing my tires. Rotated every oil change. Was not pleased with the wear of those two tires. Have since sold them to try and make my money back for another set. I just ordered 39x13.50x17 for my truck now and they’re on indefinite back order. Really liked the look and performance, so I went with the KM3 again in a larger size. I hope these ones wear fine, and are put into production soon!

Love the tire off road, performs excellent and absorbs a lot of shock and impact. They are heavier and mileage has decreased. I’ve had them since 2019 and have put @ 15k miles on them. Still holding at 70% tread life. Rotate every oil change. Here’s the kicker; they are squirrelly on the freeway and like to wander the lane. They can be a bit wishy washy if you have to abruptly lift off the throttle. I’ve put BFG on all my cars and trucks for near 20 years and always will. I think when these go, I’ll back down to the AT’s. Lastly, I did buy a fifth spare MT so I’ll be offloading a new MT to swap to AT’s. Love the tire, off road they are king, on road you need to be ready to provide extra driver input.

These are really fantastic tires off road and the tread noise had been very tolerable until my first rotate and balance at 4,600 miles. High pitch wine is now not tolerable. I'm very surprised.

I have had these tires for over six months and put a considerable amount of miles on them in six months, between driving a lot of highway miles and a lot of off-road miles they hold up. all of my wheeling buddies run other competitive MT tires and none of them grip up nearly as well, I have used them in snow, mud, dirt, and slick rock, and I have not been impressed by the competition. KM3 is my go to tire for sure. also surprisingly quite at highspeed and around town.