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Justme44
03-28-2016, 05:56 PM
Can I run new Goodyear Unisteel G614 RST tires on my 6 lug steel rims at 85 psi? I have a 2000 3280rl. I want to use really good tires and the tires on the rig look very old.
Dennis

rohrmann
03-28-2016, 06:03 PM
You probably could do that. If you have 6 lug wheels, you should have 6,000 lb axles, and if that is the case, you could easily use good LT truck tires, which will have 3042 lbs capacity at 80 psi, for a lot less money, and have just as reliable a tire as the G614. There are some all steel LT tires, that are 10 ply rated, that will do what you want.

WeBeFulltime
03-29-2016, 12:36 AM
quote:Originally posted by rohrmann

You probably could do that. If you have 6 lug wheels, you should have 6,000 lb axles, and if that is the case, you could easily use good LT truck tires, which will have 3042 lbs capacity at 80 psi, for a lot less money, and have just as reliable a tire as the G614. There are some all steel LT tires, that are 10 ply rated, that will do what you want.


Agree! Overkill and a waste of a lot of money. 614s are great tires but your unit simply does not need them. I'd go with a QUALITY LT.

mlh
03-29-2016, 02:49 AM
A G614 and a same size LT tire at the same pressure have the same weight carrying capacity. But it's your money if you wont the G tires buy em but you gain nothing but peice of mind.
Lynwood

rames14
03-29-2016, 03:03 AM
I agree. As long as your tires are not the weak link, you should be good to go. I never recommend having your tires having less carrying capacity than your axles. Over on the Facebook site, someone is putting LT tires on a large coach. Giving up almost 2000 lbs of carrying capacity. Your case is different. Good luck.

DQDick
03-29-2016, 04:02 AM
I'm a big proponent of 614's but as stated above your rig simple doesn't need them. Many on this forum use good LT tires for rigs like yours with no problems at all.

rames14
03-29-2016, 04:17 AM
X2, Dick. This is our 2nd Montana with G614's. Love them. But, running at 85 psi, not really getting the money's worth.

1retired06
03-29-2016, 05:59 AM
Good LT tire option are the Firestone TransForce products

Drifty1
03-29-2016, 10:32 AM
If I was you I would try the Sailun S637 tires for the heck of it.. They cost less but you get the plys of the 614.. Just my thought..

RKassl
03-29-2016, 01:07 PM
Love my G614's anything that gives me a little more edge on the highways is just fine with me, again, this is one of those personal decisions, nobody is wrong here.

Justme44
03-29-2016, 01:32 PM
Thanks everyone for the fantastic response and informed insight.
Dennis

mhs4771
03-29-2016, 02:49 PM
A thought here: If you run a 110 PSI tire at only 85 PSI, wouldn't that be like running a tire under inflated and subject to increased heat build up? I know many are running the G's at 100 to 105, but still a lot more than 85. Probably more of a question for Lonny.

rohrmann
03-29-2016, 05:13 PM
I haven't been able to find a chart specifically for the Sailun's, but the Goodyear chart for the G614's would be similar. The weight capacity changes with the lower pressures, and as you increase the pressure, the capacity increases. At 80 psi, the weight capacity is the same as for a load range E tire, 3042 lbs, at 85 psi it's 3170 lbs, 90 psi 3300 lbs, 95 psi 3415 lbs, 100 psi 3550 lbs, 105 psi 3675 lbs, and at 110 psi it's 3750 lbs. These are the loads and pressures for the LT235/85R16 tire. So, for a 6,000 lbs axle, 80 psi would give the capacity to max out the axle rating, and for a 7,000 lb axle, you would want at least 100 psi.

Dam Worker
03-30-2016, 01:24 PM
That is good advice Bob. I would hope that it is a tougher tire even at 80psi then the inferior brands but a tire manufacter rating is still what is designed to safely carry.

Tom Marty

kozzy
03-30-2016, 04:17 PM
LT TIRES I thought didn't Handle the lateral forces imposed by a trailer and ST tires did. I'd love to use LT tires they same to be a more cost effective solution over the g614. But will they performed the same and are the as safe as ST tires? I need to replace my trailer king tires for sure

twindman
03-30-2016, 07:13 PM
I have used LT tires on the Montana for about 8-9 years now. My axle weight has been around 10,000 to 11,000 lb for total axle weight between my 2 trailers. I have also turned some pretty tight corners often and have no problems.
Maybe if you push the weight close to the max for LT tires (3042??) it might be a problem but I don't know.
EDIT - just notice you are using a 2955 - my previous was a 2980 (heavier than yours). So my feeling is you are very safe with LTs. Oh, I use Michliens if that helps.

kozzy
03-31-2016, 06:31 AM
well my GVRW is 16000 and change, pin weights is about 3000, so that leaves 13000 on my axles.
I have 7000# axles, looks like LT tires will not hold up if I switched to them

rohrmann
03-31-2016, 07:39 AM
The Sailun's are now rated as ST tires, but the Goodyear G614's are rated LT, but that is only because of it's 75 MPH speed rating. They are strictly designed for trailer use, and have the weight capacity to handle the full 7,000 lb axles. You must use a tire that at least meets the weight rating of your axle, so an LT truck tire that has a load capacity of 3042 lbs will not work.

CWSWine
03-31-2016, 09:38 AM
quote:Originally posted by mhs4771

A thought here: If you run a 110 PSI tire at only 85 PSI, wouldn't that be like running a tire under inflated and subject to increased heat build up? I know many are running the G's at 100 to 105, but still a lot more than 85. Probably more of a question for Lonny.


This is a quote from Goodyear website and the link is below.

"Be safe - if a tire has been run 20% underinflated, it must be dismounted and inspected by a trained professional. It should not be aired up without a fullinspection or without using a safety cage. Use a calibrated gauge. If your tire is rated for higher inflation pressures, a special gauge will be required designed for larger tires.

http://www.goodyearrvtires.com/tire-inflation-loading.aspx

fauch
04-08-2016, 02:28 AM
The LT tire does not reach it's capacity until 106 mph.

mlh
04-08-2016, 04:54 AM
I always try to keep my camper under 106 MPH.
Lynwood

Bama Camper
04-08-2016, 05:00 PM
Dennis,
I have been running the G614 on my 6 lug rims for a couple of years now, and for my last camper for 5 years. No problems at all except a couple of leaking valve stems. I run mine at 90 psi. According to the GY loading chart this is well within specs.

If your rim is like mine, it has a maximum load rating, but not a max pressure rating stamped on the rim. I was concerned about the pressure rating of the rim at first, because every rim I've ever seen that is rated at 3580 lbs is rated at 80 psi. But, after checking with two reliable tire shops, and a GY rep, none of them were concerned about it and and all said they had never seen a rim come apart due to excessive pressure (in RV service). In fact they all felt it could take the full 110 psi if it were not overloaded.

As far as underinflation, I think the 20% is from the lowest loaded value, not the max pressure. If it were calculated from the max pressure, that would put the underinflation pressure squarely in the middle of the load chart. I have not seen any edge wear problems with mine.

I ran the tires at 100psi for awhile, but I can tell a difference in the "ride" of the camper. No, I'm not riding in the camper, but I can tell more things are banged around. So, I lowered it to 90 psi and get a good smooth "ride".

I bought the G614s before I was aware of the Sailuns because, like you, I wanted a reliable tire. It looks like the Sailuns have a pretty good track record based on others on this forum. Next time I buy, I 'll probably consider those also, depending on price.

One bit of advice - get high pressure valve stems installed, and use the metal ones.

I have approx 20K - 25K miles on G614s running them at 90 psi without problems.