KM2 Blow out - Defender Source
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  #1  
Old May 16th, 2011, 09:01 AM
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KM2 Blow out

Last night as I neared the end of a 4.5 hour road trip running 72mph on the interstate my right rear KM2 blew out. The tire was inflated to 40psi and the truck wasn't heavily loaded but had 5 285.75's and some tools in the back. The tire that blew was a 285.75 as well.
As I went from far left lane across 5 lanes of traffic for the shoulder my girl friend wakes up and asks "what the hell are you doing ?" By the time I got to the shoulder the tire carcass was smoking. The sidewall blew out, about 6 inches from the tread straight down the sidewall towards the rim. I had been running dyna beads that Dan Chapman had given me and they were everywhere when I came to a stop. With a co2 tank and impact wrench it didn't take long to change but the way the tire blew and the way the truck handled @ 70 mph were freakish.
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  #2  
Old May 16th, 2011, 09:13 AM
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Glad you're safe, Doug. Better a rear than a front - at least you can steer with some authority!
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  #3  
Old May 16th, 2011, 09:51 AM
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Doug glad to hear you and the truck are ok.
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  #4  
Old May 16th, 2011, 09:53 AM
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Nice work getting over across all that traffic! Years ago I had a very similar experience with the stock 265/75 BFG AT. My back left tire blew while in route to the beach on a Friday July 4th... lots of traffic going down I40. I was in the far left lane too- maybe these BFG tires don't appreciate driving in the fast lane. I agree through, the truck handled surprisingly well!

Glad you're okay!
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  #5  
Old May 16th, 2011, 10:07 AM
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I saw the thread title and thought you were going to tell me about a great deal on KM2's.
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  #6  
Old May 16th, 2011, 10:12 AM
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Quote:
Originally Posted by KevinNY View Post
I saw the thread title and thought you were going to tell me about a great deal on KM2's.
I have the remaining 4 with lots of tread that I'll sell. Going to run 34 10.50 16 TSL's on wolf wheels for off road rubber and have some 285 at's I'm going to run on alloys for everyday. The KM 2's don't make much sense for all the highway miles and towing I do.
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  #7  
Old May 16th, 2011, 10:14 AM
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Quote:
Originally Posted by KevinNY
I saw the thread title and thought you were going to tell me about a great deal on KM2's.
Yeah, me too. Doug, glad you're OK. How many miles were on the tires, etc.?
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  #8  
Old May 16th, 2011, 10:17 AM
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It will be interesting to see how fast somebody makes an offer on them. Will you try and warranty the tire?
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  #9  
Old May 16th, 2011, 10:19 AM
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Quote:
Originally Posted by rijosho View Post
Yeah, me too. Doug, glad you're OK. How many miles were on the tires, etc.?
dunno-guessing around 30k. Tons of tread still.

------ Follow up post added May 16th, 2011 10:19 AM ------

Quote:
Originally Posted by tjfslaughter View Post
It will be interesting to see how fast somebody makes an offer on them. Will you try and warranty the tire?
nah.
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  #10  
Old May 16th, 2011, 10:42 AM
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Any idea why? Perhaps some sidewall damage from off roading?

I have a bit of a "bubble" on the sidewall on one of my front tires which now makes me want to rotate it to the rear after reading this. Its a raised section about the size of you finger running between the tread the the rim.
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  #11  
Old May 16th, 2011, 11:17 AM
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That would make me want to take it off.
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  #12  
Old May 16th, 2011, 11:21 AM
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Quote:
Originally Posted by cgalpin View Post
Any idea why? Perhaps some sidewall damage from off roading?

I have a bit of a "bubble" on the sidewall on one of my front tires which now makes me want to rotate it to the rear after reading this. Its a raised section about the size of you finger running between the tread the the rim.
It's about to blow.
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  #13  
Old May 16th, 2011, 11:24 AM
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Thats what she said
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  #14  
Old May 16th, 2011, 11:25 AM
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Had a 255/85 Interco MT blow out on I-85 just outside Atlanta once. I was doing about 85mph just keeping up with traffic. There was a hole so big in the sidewall you could put your head inside the tire. Best part was I had a spare, but my LR bottle-jack was DOA.

I think most sidewall blow-outs are a result of the tire getting hot, typically from low air pressure. In my case, I did notice the tire was a little low, but did not think it was that low...
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  #15  
Old May 16th, 2011, 02:27 PM
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Well, maybe it isn't as bad as I was thinking. It barely shows in this photo.

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But I'm sure these chunks will scare you

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Quote:
Originally Posted by pendy
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  #16  
Old May 16th, 2011, 02:50 PM
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Dunlop Radial AT 235 85 16 is my go to road tire. Silky smooth, grippy, quiet and they got me thru the huge blizzard last year.
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  #17  
Old May 16th, 2011, 04:09 PM
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Thats scary, Id be dead if lost a tire on my Range Rover. I could probably manage in the Defender...
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  #18  
Old May 16th, 2011, 04:54 PM
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I've never heard of BFG MT's blowing out. That's about the toughest sidewall I know of.
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  #19  
Old May 16th, 2011, 04:56 PM
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Did they change it with the KM2's? I know the originals were notorious for having somewhat sub-par sidewalls... I haven't looked into the KM2's
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  #20  
Old May 16th, 2011, 05:44 PM
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Quote:
Originally Posted by cellulararrest View Post
Did they change it with the KM2's? I know the originals were notorious for having somewhat sub-par sidewalls... I haven't looked into the KM2's
Same here. We called them BFG May-Pops, because they may pop at any time. Seems a little less common since the KM2's were introduced.
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