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 > Goodyear G670 RV tires

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03FatBoy

Crossville, Tn.

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Joined: 12/28/2003

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Posted: 08/16/06 10:53am Link  |  Print  |  Notify Moderator

chastho wrote:

DaveMac wrote:

I don't like that Goodyear answer -- run the tires at 95 psi. I run my GYs, G-159, 245/70, 19.5s at 80 front and 75 duals. 95 would give me a very harsh ride! And my coach weighs in at 16,250 loaded for a trip. Maybe I'll stick with the G-159s when I buy new ones. Currently have 33,000 miles on present tires, no significant tread wear, but coming up on seven years old. Never have had a flat or any other failure and never rotated.
Would like to hear from others running G-159s.
I was told G159's are no longer in production. I'm sure there are some out there but check DOT numbers before buying


We live in the town that's home to a Goodyear plant that happens to make the G670's and used to make the 159's. Notice the operative words there, "used to". They no longer make the 159, but I have drank an adult beverage a time or two with one of the quys that builds the G670 and this guy's attention to detail is second to NONE!
Plus he knows we have them on our MH and would tell me if there was a production issue!


Melissa & Steve (MNC USNR retired)
FMCA F335327, GS
'05 HR Ambassador 36PDD, Saturn Vue Toad
8.3L Cummins w/ 6sp Allison

wilanddij

CA Desert

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Posted: 08/16/06 01:02pm Link  |  Print  |  Notify Moderator

Seems to me that running the tires at 95psi on a 32' coach is very high. The maximum recommended psi on my 32' Southwind with 245/70's is 85psi. My 4-corner weight says I can run them at 80psi, which is what I do for the duals, but I still run the steer tires at 85psi (recommended by an experienced alignment shop). BTW, have only had one problem with tires in about 10K miles - ran over a sheet rock screw & had to have a patch put in.


Will & Di
2004 Southwind 32VS
Workhorse/8.1
Ford C-Max/Blue Ox
"We have met the enemy, and he is us" Pogo

angelman

Long Island, N.Y.

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Posted: 08/16/06 01:06pm Link  |  Print  |  Notify Moderator

You first stated that your rig was 5500lbs front and 11500 rear. That equals 17000 in my book. I belive your over working the "F" rated tires. Your rig should have the "G" rated tires on it. I would have gone with the 245's. This past weekend we went to hershey P.A. and I brought along a infrared temp. gun to check the tire temps. The ambient temp was 90 and the street was 119. The tires in the rear were 140 and the front were 123 degree. I run the 245/70/19.5 @ 100 psi all around. I typically drive @ 70-75 mph. My moho weighs 18,100lbs. They felt a lot hotter than they actually were. BTW the allison 1000 was 154 degree after a lot of hill climbing. Thats with transynd fluid.

rrobert

Buffalo, MN

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Posted: 08/16/06 02:26pm Link  |  Print  |  Notify Moderator

BTW, before I brought the bad tires to GYs attention I did go back and have the rig weighed with everything that was in it on the trip plus a full tank of gas. I was never able to fill up on the trip since the gas pump stopped at $75.00. The steer axle was 6440 and the drive axle was 12920. The gross was 19360, well under the 22,000 lbs that the coach placard shows as Max gross at 85PSI. I didn't want to accuse GY of a bad tire if I was at fault. I'm glad I went through it all now since they did find the other bad tires.

Roger

Cousin_Eddy

Peoria, AZ

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Posted: 08/16/06 02:32pm Link  |  Print  |  Notify Moderator

You people talk like if your tire is rated for 2800 lbs and you load it to 2801 you will have an instant blowout. Or if you ran it at 74 psi for one trip all hell is going to break loose. The engineers rate these tires with a factor of safey and they can tolerate a margin of overload and underpressure. They have to because of manufacturing variance. These failures are due to manufacturing defects....Pure and simple. You never know if your new tire will have one. It could happen with any brand to anyone. Most of these latent defects will expose itself in the first couple hundred miles. Like it or not, the consumer is the test dummy. Just hope you get good service like in this case.


1995 33' Southwind Fleetwood Model LW

DFord

Near St Louis, MO

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Posted: 08/16/06 02:41pm Link  |  Print  |  Notify Moderator

No need for "G" rated tires here. If you divide the 5500 lb rating by 2 = 2750 lbs each tire and 11500 by 4 = 2875 lbs each tire. These figures are well within the capacity of the "F" rated 225/70R19.5 G670RV tires.

At the minimum of 70 psi inflation, the 225/70R19.5 G670RV can safely support 2895 lbs each when used as a single tire and 2720 each when used as dual tires. That would give you 5790 lbs on the front axle and 10880 lbs on a dual rear axle. Remember, those loads were at the minimum pressure of 70 psi.

At the maximum inflation pressure of 95 psi the "F" rated 225/70R19.5 G670RV tire will carry 3640 lbs as a single and 3415 lbs when used for duals. 3640 x 2 = 7280 lbs for the front axle and 3415 x 4 = 13660 lbs when used on a dual rear axle.

With the 5500 lb front axle and 11500 lb rear axle the "F" rating is well within the capacity of this application.

As long as you're not close to the rated load figures, there is no reason to pay the extra $$ for the "G" rated tires.

Reference:
Goodyear's Website ->
http://www.goodyear.com/rv/tirecare/loadinflationtables.html

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