I know itís the design of the tire but always thought of them as built in siping from the factory. Anyhow I gave BFG a call a couple of hours ago and asked what the groves in the KM2s were called. I was told that the groves in the tread blocks were siping. Hereís their number (1-888-871-6666) if anyone cares to call them.
Wow, I’ve been through a few sets of KM2s but never worn them down that far. My tires always started to cup way before that; most likely my fault because I never rotated them.
I’m far from a tire expert but I’m thinking that if one was to add more siping to a mud terrain tire that I doubt they would go much farther than what you see on yours. The reason I say that is because the lugs would probably lose chunks a lot easier than what the factory designed into them if grooved too deep.
Goodrich may call those sipes, but from what I've read on this forum, don't make the KM2 an effective wet road/snow & ice tire. My Grabber AT2s are good all around ATs, but they wouldn't be so good in mud and they only have 2 ply sidewalls, and I'm thinking the 3 ply sidewall KM2s with real sipes added would be a great off road tire for year round DD? Anyone doing this?
The "siping" on the outside of the tread on.the km2s, which I know isn't really siping....beware, when that wears down, they do lose a bit of traction. I learned that at a stoplight in the rain (the first rain after they'd worn); luckily, I could just go through it, once I realized I want stopping.
Well maybe itís not the traditional siping you would see on a passenger tire or an all-terrain but isnít it sniping none the less? The KM2s are a huge improvement in wet road conditions compared to the original KMs which have absolutely no sniping/grooves.
Well maybe its not the traditional siping you would see on a passenger tire or an all-terrain but isnt it sniping none the less? The KM2s are a huge improvement in wet road conditions compared to the original KMs which have absolutely no sniping/grooves.
Yeah, I agree & I've been very happy with my km2s here in rainy FL.
I ran KM2's on my 2500HD and came from a Bridgestone Dueller HT and noticed no adverse effects on wet pavement traction even with the lack of "sipes". The extra grooves still allow water to channel and give more road contact than the previous KM. They are leaps and bounds over the KM1's which I also ran and were like lollerskates.
Not a good direct comparison though since that truck had a mile long wheel base and IFS so its rode manners were great. My Jeep on the other hand will lose traction and slide the back end around if it even looks like rain outside. Currently running Grabber AT2's on it, I attribute the poor wet weather performance to the light weight and relatively short wheel base rather than the tire.
I also live in the rainiest and wettest part of the United States (which might surprise you is southern Alabama we average 72" of rain a year) so I drive on a lot of wet roads.
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He's a pluck as they come, or ever can;
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For he's just the U.S. Government's hired man.
I had KM2s. The factory has grooves in them.
I also had KMs.
The KMs were siped and it made a MASSIVE difference in rain, ice, etc. Assuming the rubber compound is similar, I think if you paid to have them siped at a tire shop, you would also see an improvement. Mine were done with an Ideal heated knife by me in my garage.
In the attached picture you can see the shiny dark part is where the blade heater ran, on either side of that I had a 5mm deep cut that opened up and grabbed a lot of bite on slick surfaces. I only had minor chunking at worst, and a marginal increase in noise with the sipes. If you think about it, in the right conditions you have effectively tripled the number of biting edges.