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footslogger's avatar
footslogger
Explorer
Sep 10, 2016

Urgent: Need Tire Advice Class A Diesel

Today, Friday Sep 9, I had an incident and punctured a sidewall in Duluth MN. Currently I have Toyo 12R22.5 all around. These tires were installed in July 2010, so they have been in use for a little over 6 years. The tires were not fresh when I installed them: they ranged from 1.5 years to 0.5 years old when installed (I was misled by the dealer). Since they are almost aged out I’m inclined to replace all 6, if I can find a suitable set. Therein lies the rub.

I called a local Class A RV dealer for a recommended tire vendor. The first could get nothing until at least Wednesday. The other could get me some Goodyear G661s in my size on Monday morning (mine is an uncommon size). The dealer said he had put this model on RVs in the past with no complaint. I looked up this model on the Goodyear site, and it is characterized as a truck tire rather than an RV tire.

So, it looks like my options are to buy one or a whole set of the GY G661 or stay here for up to a week if I choose a different model or size. I can’t really do any more until Monday. We have been on the road for over two months and need to be home in NC in a week or so, so our time is not unlimited I will do some research over the weekend for other models.

In the meantime:

1. Does anyone have any experience with the GY G661.

2. I like my Toyos, but that may not be an option. Any other recommendation for a particular model?
Class A
  • jplante4's avatar
    jplante4
    Explorer II
    Sep 10, 2016
    I'm assuming you meant to type 12R22.5.

    I had 9R22.5 on the Sahara but was having a hard time finding them. The manufacturer also recommended 25570R22.5 as well. I bought a set of 6 Yokohama RY023 tires for $2500. These are 16 ply H rated tires. The only issue is the smaller diameter makes my speedo read high.

    Here's a thread on the 661s.
  • footslogger's avatar
    footslogger
    Explorer
    Sep 10, 2016
    Yes 12R22.5. I have edited the original post. Thanks for the link.

    Myron


    jplante4 wrote:
    I'm assuming you meant to type 12R22.5.

    I had 9R22.5 on the Sahara but was having a hard time finding them. The manufacturer also recommended 25570R22.5 as well. I bought a set of 6 Yokohama RY023 tires for $2500. These are 16 ply H rated tires. The only issue is the smaller diameter makes my speedo read high.

    Here's a thread on the 661s.
  • gbopp's avatar
    gbopp
    Explorer
    Sep 10, 2016
    How about just replacing the steer tires until you get home?
    Then if you don't like the GY's you won't take as much of a beating if you decide to replace them.
  • Mile_High's avatar
    Mile_High
    Explorer
    Sep 10, 2016
    I personally would wait until Wed. I wouldn't mix tires brands. For what you saved buying those Toyos, you pay in lack of availability.
  • lryrob9301's avatar
    lryrob9301
    Explorer
    Sep 10, 2016
    Don't make a decision in a panic. If the front tire is damaged move the outer rear to the front and buy a good used, or cheap new similar size replacement to get you home. Then make a rational decision about replacing your tires.
  • Ivylog's avatar
    Ivylog
    Explorer III
    Sep 10, 2016
    I have no idea why on a 33' coach they put 12R22.5 tires. What pressures do you run in them... 85 lbs ??? My point is a 12R22.5 is way more tire than you need for your weights. I would go to 11R22.5 tires that have 492 revs/mile instead of the 12s 487... not enough difference to worry about. You would have to increase your tire pressures by 10 psi because the 11R has a little less load carrying capacity.

    A 11R is a very common truck tire (your 12R is not a RV tire) and they may even have it in Toyo or Hankook for a lot less money. I would put two 11R on the front and get back to NC. I'm running six Hankook 11R/22.5 on the back of my DP because I did not need 295/80/22.5 on the rear for my weights. I'm running 315s on the front instead of 295s. Not only am I mixing sizes, I'm mixing brands... Firestone and Hankook.

    I agree with the above post if you can buy a used 12R22.5... put it on the back and go home. When you replace all of your tires I would SERIOUSLY look at putting 11Rs back on it.
  • Sully2's avatar
    Sully2
    Explorer
    Sep 10, 2016
    Ivylog wrote:
    I have no idea why on a 33' coach they put 12R22.5 tires. What pressures do you run in them... 85 lbs ??? My point is a 12R22.5 is way more tire than you need for your weights. I would go to 11R22.5 tires that have 492 revs/mile instead of the 12s 487... not enough difference to worry about. You would have to increase your tire pressures by 10 psi because the 11R has a little less load carrying capacity.
    A 11R is a very common truck tire (your 12R is not a RV tire) and they may even have it in Toyo or Hankook for a lot less money. I would put two 11R on the front and get back to NC. I'm running six Hankook 11R/22.5 on the back of my DP because I did not need 295/80/22.5 on the rear for my weights. I'm running 315s on the front instead of 295s.


    BIG rubber was installed on CC's because of an imbalance situation.....and when 10's and 11's were installed they bew some out causing wrecks.....hence 12.00 tires at 120 inflation front and 110 psi rear
  • MountainAir05's avatar
    MountainAir05
    Explorer II
    Sep 10, 2016
    https://www.bridgestone.com.vn/en/customer-services/about-tires/tires-conversion-chart
  • usersmanual's avatar
    usersmanual
    Explorer
    Sep 10, 2016
    footslogger wrote:
    Today, Friday Sep 9, I had an incident and punctured a sidewall in Duluth MN. Currently I have Toyo 12R22.5 all around. These tires were installed in July 2010, so they have been in use for a little over 6 years. The tires were not fresh when I installed them: they ranged from 1.5 years to 0.5 years old when installed (I was misled by the dealer). Since they are almost aged out I’m inclined to replace all 6, if I can find a suitable set. Therein lies the rub.

    I called a local Class A RV dealer for a recommended tire vendor. The first could get nothing until at least Wednesday. The other could get me some Goodyear G661s in my size on Monday morning (mine is an uncommon size). The dealer said he had put this model on RVs in the past with no complaint. I looked up this model on the Goodyear site, and it is characterized as a truck tire rather than an RV tire.

    So, it looks like my options are to buy one or a whole set of the GY G661 or stay here for up to a week if I choose a different model or size. I can’t really do any more until Monday. We have been on the road for over two months and need to be home in NC in a week or so, so our time is not unlimited I will do some research over the weekend for other models.

    In the meantime:

    1. Does anyone have any experience with the GY G661.

    2. I like my Toyos, but that may not be an option. Any other recommendation for a particular model?

    your tires are good for 10 years as long as they don't have sidewall cracks etc.and obviously decent tread depth
    iam surprized your tires are that big on a little 33 ft bus?
  • footslogger's avatar
    footslogger
    Explorer
    Sep 10, 2016
    OP here. Lot's of good suggestions. Keep 'em coming.

    I'll spend the weekend considering my options. I can't really do anything until Monday anyway.

    Country Coach tended towards overkill, perhaps the reason for furnishing the 12Rs.

    If either of the dealers here participates in the FMCA Michelin Advantage program, I might replace all 6 with whatever appropriate tire they can get quickly.

    The punctured tire is on the rear. I may investigate installing a used tire on the rear, or perhaps 2 new steer tires and put an older steer tire on the rear. I'll consult with with dealer on Monday regarding my options.

    Myron

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