Revo 285s Cupping on an LX...Why?

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FinallyGotOne!

FinallyGotOne!

Joined
Jan 5, 2005
Threads
22
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Location
Huntsville, Alabama
Note: I searched and didn't find a definitive answer, so I am braving the flames and starting a new thread...

2000 LX, 145K, Revo 285s with about 45K on them, always run ~50 psi, rotate every 7k or so

I love these tires! Until recently, that is. Road noise has been getting worse, alternating blocks of tread wearing more rapidly than the others - obvuiously cupping bigtime. Major road noise. There is PLENTY of tread left on these tires even after 45K miles. However, the noise is getting out of hand.

I bought the Firestone warranty when tires were new. I talked to the manager today, who said he was willing to honor the warranty if I would be willing to have the dealer check out the "shocks or struts". He didn't seem to get the fact that I had the AHC system, properly maintained and completely functional.

I have seen threads here referring to low pressures (I always run higher than specified), alignment problems (checked by Firestone a couple of months ago and good to go), shock problems (AHC), and junk tires (these are Revos).

Any ideas/experience you can share? I don't want to pay the stealer to tell me that everything is A-OK.

Thanks much! And bring on the flames!! ;p
 
I had REVO 2's 275 70/16's on my '98 - they did get louder after about 30-40k, very quiet when new. No cupping, and I generally overinflate. Are you running the 285's on stock rims?

I now have 18" tundra rims - I would consider them again - great overall tire for a daily driver.
 
FinallyGotOne! said:
Road noise has been getting worse, alternating blocks of tread wearing more rapidly than the others - obviously cupping bigtime.
Click to expand...

Just the fronts, or rears too? Is the uneven wear in just a few places (would suggest a balance or shock issue) or all around the tire (would suggest an alignment issue)? When you write "alternating" you're referring to the circumference and not the width of the tire, correct?
 
alignment and waiting too long for tire rotations can cause what you are saying....and as you get that many miles on the tires in my experience they all become noisier and more prone to uneven wear.

I have almost 30,000 on my Trail Grapplers and noticeably louder than when new but still less than Super Swampers :).

Since you have had alignment checked...only thing I can offer is tire rotation...I do a full 5 tire rotation every 3-4k miles and it helps quite a bit....

Do a systematic rotation and see if it helps...maybe do it every 1000-2000 miles until you have gone through 3-4 rotations and such and see if it helps...if you rotate yourself of course as that would be expensive to pay every time.

My pattern is this: Called Rear Cross:
Spare to RtRear
RtRear to RtFront
RtFront to LtRear
LtRear to LtFront
LtFront to Spare

use the same pattern every time and do it more often and might help...but like I said...I have some cupping on mine too but with aggressive Mud Terrains I dont expect perfect tire wear for life of tires.
 
Brock said:
alignment and waiting too long for tire rotations can cause what you are saying....and as you get that many miles on the tires in my experience they all become noisier and more prone to uneven wear.

I have almost 30,000 on my Trail Grapplers and noticeably louder than when new but still less than Super Swampers :).

Since you have had alignment checked...only thing I can offer is tire rotation...I do a full 5 tire rotation every 3-4k miles and it helps quite a bit....

Do a systematic rotation and see if it helps...maybe do it every 1000-2000 miles until you have gone through 3-4 rotations and such and see if it helps...if you rotate yourself of course as that would be expensive to pay every time.

My pattern is this: Called Rear Cross:
Spare to RtRear
RtRear to RtFront
RtFront to LtRear
LtRear to LtFront
LtFront to Spare

use the same pattern every time and do it more often and might help...but like I said...I have some cupping on mine too but with aggressive Mud Terrains I dont expect perfect tire wear for life of tires.
Click to expand...

Brock - great stuff. Thanks. I have been kicking myself since I had the first rotation done - I forgot to tell them to include the spare and since I was moving acorss the country the following week, I decided to just forget about it. By the time the next rotation came along, I didn't want to get one of the tires out of sync, so I left the spare in place...the payoff is that I only have to buy three tires this time around.

Yes, I do my own rotations when the tires don't need balancing. I will give your idea a try and when I get new tires I will try your rotation scheme. Thanks
 
hope it works...sounds like there is not much else to consider. just my two cents...
 
I doubt rotation is an issue; 7k rotations on Revo's are plenty frequent enough if aligned properly IMO. I'd look hard at alignment, especially if you say AHC is functioning fine. One other thing that sticks out to me in the original post is running at 50psi. Running at 50psi when unloaded with Revo's is a bit overkill IMO. They run fine and the contact patch is nice and even at 40-44psi when empty. Towing or loaded down I can see 50 but you aren't leaving any MPG's on the table at 40-44 and the tire is not carrying itself on the center section like it is on 50psi empty. It's also a bit softer and will absorb shock a bit better than 50psi on an empty 100 series. Scalloping can be created by a tire bouncing down the road and if you are sure the AHC is good to go then maybe the rock hard pressure on an empty 100 is contributing. That's hard to believe as heavy as the 100 is stock though.

Just my opinion but I've got quite a few miles on Revo's under my belt. I put 47k on my first set of Revo's and feel i took them off too early. I just didn't know any better! They were still very even and not cupped at all. The second set I ran to 58k and they wore just as evenly but were pretty much at the end of their tread life for wet conditions IMO. Both sets were probably rotated 3 times each to show you the importance of rotation to a Revo...

Of course there's always the possibility that your set left the factory not quite up to par and there's nothing you could've done about it! 47k isn't that far from the end of life for these tires as I think 50k is to be expected and 60k is out of reach on a vehicle this heavy.
 
The same thing occurred to my 100, only on the front tires. My shocks were toast after 200k miles, which gave me a good reason to do the lift. The wear made it look under inflated. The noise was terrible so I used it as an excuse to get some new tires.

This was my second set of Revos. I had gotten 60K out of the last set. This set lasted around 45k. It makes sense that my worn out suspension wasn't keeping the tire aligned.
 
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yeah 50psi is high....42psi on my trail grapplers is as high as I would want to go for ride and contact with road....
 
Tire Inflation

This is a slight hijack, I know, but almost all of the tire mfgs. publish inflation tables. If you are moving from LT to LT tires (or Pmetruc to Pmetric) tires and/or have access to a scale, you can fairly easily determine what pressure you should be running by utilizing the tables. For most of us, we are changing from Pmetric to LT tires and the tables become pretty important since there are some tweaks to the pressures you need to run.

Toyo has a great discussion related to switching from P to LT tires (or the other way round). I can't get the link to the pdf to work, but Follow this Link and click or double click on the "Load & Inflation Table Application Guide" to get the full pdf.

:steer:
 
FinallyGotOne! said:
Note:

2000 LX, 145K, Revo 285s with about 45K on them, always run ~50 psi, rotate every 7k or so
Click to expand...

It's a certainty that you're over inflating the tires when recommended is 32psi on LX and a "max" by tire manufacturer is 50 under any and all driving conditions (which means you need to run lower than 50 to accomodate the tires when heated). aand an over inflated tire causes cupping, which your Firestone rep should have explained.

And I would deny him the right to look at your car (sure so he can cloud the issue/s and wiggle out of warrantee repair) until he shows you that investigation of the vehicle is necessary as part of the warranty process. Certainly, he'll say he needs to but make him show you.
 
Different Revos have different max PSI. If you're running the extra load, "E" class Revo (most of the 285 x 75 but not most of the 285 x 70), you can go as high as 80 psi but most Revo's are 44-50 PSI max (such as the 285 x 70 and most 275 x 'x' Revos).

In an any case with the extra load tire you still want to inflate the tire according to your load, which puts you back in the 30's for PSI under normal driving without load/towing. You'd run 50psi when you're under serious load or towing, else the pressure is too high, which will cup the tread.
 
Great Advice - perhaps this cupping is the result of running at higher pressures. I pull my race trailer and a 6000 lb boat quite often and the truck handles and rides better with the higher pressure.

Note these Revos are marked max pressure = 65 psi. I typically keep them at somewhere around 50 psi.

As requested, pics below. Perhaps this thread will be a good reference for someone else in the future. Pics are of all four corners, and I intend to post a recent alignment diagram as well.

Bottom Line: I would like to see more even wear, but at over 50K miles, there is plenty of tread left, I am very happy with these tires, and I highly recommend them.

Again, thanks for all of your help!!
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