UZJ100 Tire wear question

[Trapper50cal]

I had a set of Toyo Open Country C/Ts (LT285/75-16, C Load-Rating ) with a similar 4 diagonal block across tread pattern. The C/Ts are a little less aggressive... bigger blocks and smaller grove, but a similar pattern. My fronts cupped horribly at about 10K. About 7500 of these miles were before I replaced my steering rack/bushings/tie rod ends. I then tried rotating them every 5K for the next 15K, and I never could get the cup to wear out of them. Road noise, especially slow speed or when coming to a stop, was horrible. I ended up replacing them at 35K because I couldn't stand the noise. Which was a shame, because they were otherwise good tires and had about half the tread left!

Running around town, whenever I see a Jeep or other 4X4 with that style of tread (Toyo MTs, BFG KM3s, Cooper SST Pros, etc.), about 3/4 of them that I see are visibly cupped (alternating dark/light stripes on the tread). It also seems to me that the full-time 4WD on these trucks is especially hard on front tires, and any worn components exacerbates the effect. Plus, I think that tread pattern is more prone to cupping.

Short answer, yes, I would try to swap in a new tire. Also, make sure your front end is tight. This is likely a symptom of some other maintenance issues. Good luck!

Front end should be good...
New a-arm bushings, ball joints, wheel bearings no play, new steering rack, TRE's (Steering arms) diff case bushings.
I think it comes down (partially) to tread lug width vs. tread voids...and MT's have the most void.

 

[Trapper50cal]

1X - 255/85r16 Falken Wlidpeak MT-01 ordered.

I have to say, I'm impressed that Discount Tire's price locally was identical to Amazon's price and ebay's price.

 

[Bisho]

You certainly don’t need E rating on our trucks for weight. Es generally carry 3500lb each. Probably the heaviest rig on here would be OK with C rated (6ply) - KO2 C rated can carry 1765lb each.

I want the Es for the 10 ply sidewalls on the trails for my 100, for the 470 I’ll be happy with Cs. I run ~17psi on the trails and 33 psi on the road. I experimented and found no difference on mpg or tire wear with higher psi, but the ride is sure better (Falken ATs). I rotate every 5k and got 65k out of my last set.

 

[Mike NXP]

You certainly don’t need E rating on our trucks for weight. Es generally carry 3500lb each. Probably the heaviest rig on here would be OK with C rated (6ply) - KO2 C rated can carry 1765lb each.

I want the Es for the 10 ply sidewalls on the trails for my 100, for the 470 I’ll be happy with Cs. I run ~17psi on the trails and 33 psi on the road. I experimented and found no difference on mpg or tire wear with higher psi, but the ride is sure better (Falken ATs). I rotate every 5k and got 65k out of my last set.

Yeah but the e rated payload capacity your referring to is with the tire at max inflation , which no one is running. Our heavy rigs with e rated can benefit by having the extra load capacity at lower pressures...

And the C rating you referenced, so is the max weight rating at 1765lbs per tire? x 4 tires..... Thats just over 7k lbs, that's what my truck weighs in at ...now air down a few lbs and your under rated

And it doesnt have a 10ply sidewall, it has a three ply sidewall, which is sweet and not many other tires have . ( I think Cooper is the other 3 ply sidewall e rated but there could be others )

 

[Trapper50cal]

Yeah but the e rated payload capacity your referring to is with the tire at max inflation , which no one is running. Our heavy rigs with e rated can benefit by having the extra load capacity at lower pressures...

And the C rating you referenced, so is the max weight rating at 1765lbs per tire? x 4 tires..... Thats just over 7k lbs, that's what my truck weighs in at ...now air down a few lbs and your under rated

And it doesnt have a 10ply sidewall, it has a three ply sidewall, which is sweet and not many other tires have . ( I think Cooper is the other 3 ply sidewall e rated but there could be others )

You know, I saw something in the specs of these tires that was surprising to me...

The max inflate pressure for these Falken MT's is 80psi !!! That was surprising to me.

It begs the question: How far can I go in the name of decreasing rolling resistance?

I think I'm at around 42-44psi. Could I got to 50psi? higher?

It also begs the question: What's the best psi to try to avoid cupping? IS that dependent on the contact patch and therefore the rim width?

 

[Josie'sLandCruiser]

When I bought my '99 UZJ100 in 2019 it had a good set of BFG KO2 E rated all terrain tires on it. These tires have continued to perform well on and off road.
I typically run 30 PSI when doing mixed paved and dirt roads, with great traction and good ride quality. Long highway trips bump the tire pressure to 40 PSI for better fuel mileage - ride quality does suffer a bit.