For Diesel Gunner
Q: Have you found any tires that cannot take the severe pounding? It would seem to me that bruised cases and separations could become an issue when they are subjected to the type of driving that the truck would become capable of. Perhaps the question should be what brands and types of tires do you recommend?
A: We don't consider ourselves to be tire experts but we've got some experience with certain brands. Tires do a lot of different things and to help me understand all the different aspects of tire design I've recently had a couple of classes from some heavy hitters in the tire industry. Most tires have 5 - 15 different rubber compounds in the construction - even across the tread - you can measure it with a durometer (a small device that measures hardness). Nylon, aramid fiber, kevlar and steel are some of the materials used to make a good carcass. There's so much to say about tires, I think I would be opening a huge can of worms to try to discuss even a small fraction of the subject. Suffice to say that tire design is an art that's as complicated as suspension.
Anyway, here's what we've learned from experience - tires we have actually used extensively in many situations. These are general impressions and not to be construed as absolute truth - just opinions based on experience. And remember, we're off-road oriented, so I'm not talking about what works well for towing or for safety when overloaded - or for 2wd street guys.
BFG "All-Terrain T/A ko" - pretty good tire - it's a great all-around tire and a solid performer on the pavement. It has a nice, supple, sidewall that gives a really smooth road ride. It's not the best off-road tire because the tread pattern doesn't provide much "dig" and it flats when a rock is anywhere near it. I've torn these clean off the rim by hitting stuff at speed. Works well in deep sand precisely because it doesn't dig in. For an "all terrain" type tire, it gives great traction on wet pavement. The Mud Terrain is about the same, but with a more aggressive (noisier) tread pattern. I like the way MT's handle better than the AT. On some types of terrain the aggressive edges of the tire permit more precise turning at speed. Same basic carcass. The MT's also flat kind of easily for an "off-road" tire.
BFG "Baja T/A" - a strong, nasty tire for serious off-road work. In the morning, on cold days the nylon carcass gets square on the bottom and takes a while to shake out (for the tire to get round again). Noisy, but aggressive and tough when hitting rocks. I like the tread compound for hard dirt - it seems to give a lot of traction. Exiting turns at full throttle, you can hear it "peel out" as if it were on pavement. Not good on the street - especially wet pavement. Also the sidewall is really stiff and tough, so it doesn't provide much cushion. Gives great flat resistance.
BFG "Project" - try to get a hold of some! All the off-road benefits of the "Baja T/A" but with no street orientation whatsoever! Great tire - no sidewall traction, will never dig in in the sand. You've got to drive these like you're flying an F-18 - full throttle and never hooked up - finesse around every corner. VERY hard to flat but it can be done. Run 'em at 25 psi and forget about 'em. I think they work better on lighter vehicles.
Goodyear MTR - one of my favorites. Will get square spots on cold mornings, but not as bad as the "Baja T/A. " Tough, tough sidewall - I mean, when they're off the rim, the sidewall feels about an inch thick! Not a kind street ride. Not terrible, just not supple over the little bumps. This is a burly off-road tire, made for serious, high speed (or low speed) work - I've got 65,000 hard miles (two sets - at least 40k off-road) of experience with this tire and I've never had a flat! Surprisingly quiet for how aggressive the tread pattern is. They tend to get noisier as they wear down. Don't know why. After serious hammering over lava rocks, sand, gravel, you name it - they hold together - the tread doesn't "chunk" off and the insides still look new. WE HAVE NEVER BEEN ABLE TO DAMAGE THESE TIRES IN ANY WAY. Also, they work really well in sand - hard to understand because the shape of the tire's tread would lead one to believe that they would dig trenches everywhere - but they don't. I think others who have used this tire will corroborate our findings. It's a great one. 30 psi works well for street and dirt. Any more pressure and freeway expansion joints will send sine waves through the sidewall that could kill your cat. Probably the best realistic off-road tire for the heavy trucks you guys have. Outperforms all the BFG's hands down - including the elusive "Projects. "
Toyo "Open Country AT" - really good tire for street handling. Gives the feel of a performance road tire and a modern tread pattern that's pretty versatile off-road. We tested these with an 18" diameter wheel and found that they worked well just about everywhere. The truck handled like a sports car on twisty pavement. Really good wet pavement traction. Excellent in sand. Not a very thick sidewall. We never flatted with this tire but only tested for a few thousand miles. Seems to be a good, street-oriented all-around tire, similar to the BFG AT.
Toyo MT - still testing - kind of a combination between the MTR and the OPAT. Like an MTR without the bad aftertaste. This could be a hasty judgment but it may be the perfect tire. We'll give a full report after more Baja miles.
By the way, Weld is finally making the wheels we've requested. They should be available immediately. The sizes are 18x8. 5 and 20x8. 5 (the latter more for the street and show guys). The styles are "Cheyenne 8" and "Dagger 8. " They are in a +45mm offset and are made specifically to fit the HD Rams INSIDE THE FENDERWELLS. They are one piece, forged wheels with a huge load rating designed specifically for your trucks. I've been warned that unless Weld gets some early orders, they're going to get discontinued.
Hope this info helps!
Best Regards,
Kent Kroeker
T. Rex Engineering