Goodyear MT/Rs w/Kevlar thoughts after the first 5k
It's not uncommon to need to re-balance a new set of MTs after the first 500 miles and my complaint wasn't with the balancing but how much weight it took. As mentioned, the Hunter GSP9700 kicked the one tire and said I should get it replaced. Squashed for time I got the Dyna beads in and rotated it in as a spare with no issues.
The reason for the secondary balance is supposedly because some of the factory out of roundness will take care of itself with the initial road wear.
The reason for the secondary balance is supposedly because some of the factory out of roundness will take care of itself with the initial road wear.
Discount Tire Direct is now offering an $80 dollar rebate on this very tire (among a handful of other models). I was just about to pull the trigger on these when I ran into this thread. I'm curious to see if there is a sweet spot in terms of pressure, or if these guys are rolling off the production line with poor quality control on Goodyear's part.
Discount Tire Direct is now offering an $80 dollar rebate on this very tire (among a handful of other models). I was just about to pull the trigger on these when I ran into this thread. I'm curious to see if there is a sweet spot in terms of pressure, or if these guys are rolling off the production line with poor quality control on Goodyear's part.
In hindsight I knew better and have in the past spoke my piece when someone would sing the praises of load rated "C" tire. The problem is that they don't match up with either of my two sets of springs, and I'll likely need to get a set of light duty OME springs to make things right. A JK weighing in at 500lbs more than mine probably doesn't have the same issues nor does one that's on a wider wheel. Live and learn I guess and I could have put 1500 more miles on my Toyos to roll on my trip while waiting for the tires I wanted to come in.
There are definitely higher quality tires out there and if it weren't for what I believe to be my particular issue with a lower service description for my tire size (35x12.5x17, SD 111) I probably don't start this thread. If I had opted for the LT315/70R17s or the 37x12.5x17s, I just have a bunch of wheel weights and a higher service description tire (121 and 124 respectively) and roll around on my merry way without the on road tire bounce when properly inflated.
In hindsight I knew better and have in the past spoke my piece when someone would sing the praises of load rated "C" tire. The problem is that they don't match up with either of my two sets of springs, and I'll likely need to get a set of light duty OME springs to make things right. A JK weighing in at 500lbs more than mine probably doesn't have the same issues nor does one that's on a wider wheel. Live and learn I guess and I could have put 1500 more miles on my Toyos to roll on my trip while waiting for the tires I wanted to come in.
In hindsight I knew better and have in the past spoke my piece when someone would sing the praises of load rated "C" tire. The problem is that they don't match up with either of my two sets of springs, and I'll likely need to get a set of light duty OME springs to make things right. A JK weighing in at 500lbs more than mine probably doesn't have the same issues nor does one that's on a wider wheel. Live and learn I guess and I could have put 1500 more miles on my Toyos to roll on my trip while waiting for the tires I wanted to come in.
Im a newb with tires for sure. What is so bad with load C.
There is nothing per se wrong with load range C tires. The issue in part comes from the service description being lower than stock tires (my JK came with Service Description 113 tires, the 35x12.5x17s MTRs checked in at a 111 SD). Both are load range C tires, but with the placard data and the stock tires they will support about 200lbs more per corner than what my new Goodyears would at what I deemed to be the right inflation rate for proper wear.
A couple psi of pressure shouldn't make that much difference, but tires are also matched to the suspension spring rate. My FT springs are stiffer than my stock springs which didn't matter with my heavier Toyo MTs (SD 125). Stock springs, which there are more than 20 of depending on model and accessories, along with the placard data match inflation and tire spring rates with the spring rates of the suspension. In essence, tires need to be matched with the suspension and I painted myself into a corner with the Goodyear MTRs as they don't bear enough weight at lower inflation rates.
A couple psi of pressure shouldn't make that much difference, but tires are also matched to the suspension spring rate. My FT springs are stiffer than my stock springs which didn't matter with my heavier Toyo MTs (SD 125). Stock springs, which there are more than 20 of depending on model and accessories, along with the placard data match inflation and tire spring rates with the spring rates of the suspension. In essence, tires need to be matched with the suspension and I painted myself into a corner with the Goodyear MTRs as they don't bear enough weight at lower inflation rates.
I have had my 35X12.5X17 load range C for about a month and I have already put 3500 miles on them mostly freeway. I have noticed that they are a little flighty on the freeway but I thought that had to do with the size and wider thread. I have not done any off road drivinng other than fire roads. I will do a rotaion at 5k and make sure to get them balanced again to see if they perform any different.
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Joined: Jan 2010
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There is nothing per se wrong with load range C tires. The issue in part comes from the service description being lower than stock tires (my JK came with Service Description 113 tires, the 35x12.5x17s MTRs checked in at a 111 SD). Both are load range C tires, but with the placard data and the stock tires they will support about 200lbs more per corner than what my new Goodyears would at what I deemed to be the right inflation rate for proper wear.
A couple psi of pressure shouldn't make that much difference, but tires are also matched to the suspension spring rate. My FT springs are stiffer than my stock springs which didn't matter with my heavier Toyo MTs (SD 125). Stock springs, which there are more than 20 of depending on model and accessories, along with the placard data match inflation and tire spring rates with the spring rates of the suspension. In essence, tires need to be matched with the suspension and I painted myself into a corner with the Goodyear MTRs as they don't bear enough weight at lower inflation rates.
A couple psi of pressure shouldn't make that much difference, but tires are also matched to the suspension spring rate. My FT springs are stiffer than my stock springs which didn't matter with my heavier Toyo MTs (SD 125). Stock springs, which there are more than 20 of depending on model and accessories, along with the placard data match inflation and tire spring rates with the spring rates of the suspension. In essence, tires need to be matched with the suspension and I painted myself into a corner with the Goodyear MTRs as they don't bear enough weight at lower inflation rates.

Also, for the two guys that mentioned flat spots after sitting for a while, would dynabead balancing take care of that since the beads are always balancing the tires, or is it a problem in the construction of the tire?
Last edited by bluejk09; Aug 16, 2010 at 09:44 PM.
I have ran these from 28 psi 30, 32 now 34. 34 psi seems to be the best so far for my set up. I am not sure if a different lift and or shocks would change that for someone else though. I am running TF 2.5 coils and Bilstein 5100 shocks.
I got an appt. tomorrow to get these road-forced balanced. I will post up the outcome.
I got an appt. tomorrow to get these road-forced balanced. I will post up the outcome.

Rides as good as can be expected. (Not as smooth as my Grand Cherokee but pretty good) I still have them at 35 psi but there are no more wobbles, thumps and shimmys.
I just hope it lasts.I am still amazed that as aggressive as these tires look they are fairly quiet..more of a low growl than the high pitch noise of my last set of Mastercrafts.
He did print me out some stuff from the balancer that shows what the tires did on the machine. Pretty Cool. I now have a much better understanding of what a real tire installer goes through. I was there for an hour and a half. He ended up spinning the junk one on the rim 3 times but it would never balance out right or pass the road-force.
So there is my saga. Hope it helps someone.
Last edited by Loadbreak; Aug 17, 2010 at 06:24 PM.


