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Old 05-11-2007, 01:51 PM   #31
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Originally Posted by JCS05Rubi View Post
IC jerry. I think the prev owner just did oil lube and filter for 23k

You think id be better off with the mt/rs or the bfgs?
For back East where sharp rocks aren't as common and there's lots more mud, I'd probably go for the BFG MT if I lived back there.

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Old 05-11-2007, 05:25 PM   #32
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What width wheel are you running?
Jerry,

According to my receipt they are AM EAGLE 58, size is 15x10. Could there be a problem here? Thanks.

Rob

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Old 05-11-2007, 05:31 PM   #33
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Jerry,

According to my receipt they are AM EAGLE 58, size is 15x10. Could there be a problem here? Thanks.

Rob
A 15x10 is a great street size for the size tire you're running but when you air down for offroading, a tire has a much harder time staying seated on edges 10" apart than it does when they are 8" apart. Tires aired down for offroading stay seated much more reliably on a 15x8 than a 15x10. I'd say your 15x10 is the reason you've had some tires losing their bead and losing air while you're offroading.

Think about a balloon held between two colums 8" apart vs. 10" apart. A balloon placed between the two columns 10" apart will need significantly more air pressure to remain seated than it would between the two columns 8" apart.

I go down to 7-8 psi with my 35x12.50 MT/Rs mounted on my 15x8 wheels and they've never lost their bead yet.
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Old 05-11-2007, 05:38 PM   #34
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Well, that makes perfect sense and would explain why I keep losing air. Wish I had known that prior to purchasing those rims, but I guess I didn't ask. Guess I'll have to keep my eyes open for a new set of rims. That's what I get for trusting the tire jockey at Discount Tires. Thanks for your advice and knowledge on this Jerry.

Rob
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Old 05-14-2007, 12:16 AM   #35
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I'm running 15x10 rims on my 35x12.50's and I always air down to 9 psi. I very rarely blow a bead on rocks and hell every one without beadlocks burps a tire on probably every run out here.

I personally like 10" rims better because of the wider footprint it gives me and that little bit of added stability has came in very handy before on off camber spots.

However all that being said when I go to beadlocks they will probably be 9".
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Old 12-19-2008, 08:15 PM   #36
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I know this is an old thread, but im having the same problem. I bought the jeep with 2 sets of tires, the first set got cupped, and wor out before they were worn smooth, which i then replaced with the 2nd set (two of which came cupped). I put the cupped tires on the back. Which way should I orient them to wear smooth? I oriented them so that the raised edge of the lug meets the ground first does it even matter which way the cups are facing?

Im not sure if I need to replace my shocks, since it seems like the previous owner had a problem with cupping, along with the good tires that got cupped while I owned it. The shocks seem in good working order I tried jumping on the jeep and rocking it, and it does not oscillate much after initial force.

if i do need new shocks, im getting OME's
is this a fair price?

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Old 12-19-2008, 11:25 PM   #37
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i get great miles out of my 39.5x15w tsls......i have been to tellico, harlan, badlands, livingston, wellsville, swiss,wv, french lick, haspin, lbl, coal creek, etc. etc.......thats alot of miles.....i just load it on a trailer behind my cummins tow rig and go.....i can get crazy miles and they do great in the mud and on the rocks.....not to mention i get 20mpg with the jeep on the trailer
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Old 12-20-2008, 11:48 AM   #38
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I have mt/r on my 03 Rubi and I would say that they are good tires for the off roading that I do. I did have the one on the passanger side front that cupped as described above. I rotated and ballanced every 3000 miles so why would it cup? Because I had 40,000 miles on them I replaced all four with mt/rs
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Old 12-20-2008, 12:05 PM   #39
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Cupping is never the tire's fault. Unusual tire wear problems are always a result of either a bad front-end alignment, not keeping the tires balanced, a bad shock(s), or failure to rotate the tires regularly (every 5K miles is fine). As good of a tire as the MT/R is, which is what I run, it especially needs regular tire rotations and balance checks (not directed at you carptomm).

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