My HRambler Savoy 12,000 lb is ready for new tires. What to do, whats new and "Ply vs. RADIAL?" Thanks...

I don't think they are actually 10 ply anymore, they are letter rated. E rated tires are what used to be called 10 ply. I would get at least an E rated tire, depending upon size.Ply and Radial are non-comparative terminologies. You certainly want radial, not bias ply, tires.

I run E rated tires on my one ton Ford. They used to be 10 plies, but are now 10 ply rated. The sidewalls are typically the weak point and only a couple of plies. Radial tires run with a slight bulge in the sidewall. If you go on rough roads, especially those with fractured basalt, shale or the equivalent it is easy to puncture the sidewall which is definitely not 10 plies.

I wouldn't use any tire less than a 16" load E tire on a trailer that size. However a 12000 lb trailer says nothing about tire capacity needs. What is the trailers GVWR ?? What is the trailers axle ratings ??

spoon059 wrote:I don't think they are actually 10 ply anymore, they are letter rated. E rated tires are what used to be called 10 ply. I would get at least an E rated tire, depending upon size.Ply and Radial are non-comparative terminologies. You certainly want radial, not bias ply, tires.They aren't. They are '10 play rated' not 10 actual plies in the carcass.

They all use ply ratings any more, the R is for radial vs bias ply. Here is how they size: The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters. ... For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.Now I'll recommend looking at Yokohama Geolandar in your size. The tire is an LT or light truck vs ST or special trailer. I have run them trouble free on two 5W's about the same size as yours and am almost full time, about 9 months a year. Now we wait for all the naysayers

IS A 10 PLY BEST FOR??? | Good Sam Community

spoon059
Explorer II
Mar 12, 2019
Tim wilson wrote:
getting rid of the radials and putting on the E's...

Are you reading any of this thread? RADIAL is the style of construction. You want a RADIAL tire, not a BIAS PLY tire.

The E rating is what the old "10 ply" rating was.

You want a RADIAL TIRE that is E RATED...
CALandLIN
Explorer
Mar 11, 2019
Tim wilson wrote:
My HRambler Savoy 12,000 lb is ready for new tires. What to do, whats new and "Ply vs. RADIAL?" Thanks...

I went and looked at some specs and found that almost all Savoy trailers in your weight description have 5200# vehicle certified axles and 15” wheels. So, using the 10% load capacity reserve recommendation from RVIA you would need ST225/75R15 LRE tires inflated to 80 PSI.
time2roll
Nomad
Mar 11, 2019
Tim wilson wrote:
My HRambler Savoy 12,000 lb is ready for new tires. What to do, whats new and "Ply vs. RADIAL?" Thanks...
GVWR, scale weight or axle weight. I assume two axles?

Exactly what size does it have now? What is the OEM size?

Otherwise I recommend Goodyear Endurance.
campigloo
Explorer
Mar 11, 2019
From everything I read from the tire manufacturers is ST is not a marketing classification as some seem to believe. Since the funcion or trailer tires is just to follow the tread patterns are different. Since they squirm instead of turn and since side winds affect trailers much differently that it does a truck, the sidewalks are considerably stiffer. This also helps to eliminate sway. Maybe take a look at Goodyear Marathons. My trailer is 10k and my third set of Carlisle Radial Trails have been good. I suggest not going anything less than E rated and maybe even consider G.
Happy trails!
Huntindog
Explorer
Mar 11, 2019
Tim wilson wrote:
Thanks everyone... I am down sizing from my motor home and after about 6 years I have not been up to speed on the TT tire stuff. Seems to me that mtofell 1, got my attention. *** huntindog, 15 inch currently with radial.*** jimnlin, gvwr is 10.000 lbs. I had misstated the 12.000 lbs as I just purchased the Trunon sway rig for $500.00 to be 1,step-up from that gvwr."getting rid of the radials and putting on the E's... DEGA BOUND... COME AND JOIN US. THANKS AGAIN!
Most if not all of the HRs were available with LTs as an option.

So it should be an easy swap. I would go with Michelin XPS RIBS. They are considered by many to be the gold standard. You will need to swap to 16" rims. There are more affordable LTs out there. But definantly get into 16" rims... That opens up a TON of tire choices.
Tim_wilson
Explorer
Mar 11, 2019
Thanks everyone... I am down sizing from my motor home and after about 6 years I have not been up to speed on the TT tire stuff. Seems to me that mtofell 1, got my attention. *** huntindog, 15 inch currently with radial.*** jimnlin, gvwr is 10.000 lbs. I had misstated the 12.000 lbs as I just purchased the Trunon sway rig for $500.00 to be 1,step-up from that gvwr."getting rid of the radials and putting on the E's... DEGA BOUND... COME AND JOIN US. THANKS AGAIN!
Tim_wilson
Explorer
Mar 11, 2019
Thanks everyone... I am down sizing from my motor home and after about 6 years I have not been up to speed on the TT tire stuff. Seems to me that mtofell 1, got my attention. *** huntindog, 15 inch currently with radial.*** jimnlin, gvwr is 10.000 lbs. I had misstated the 12.000 lbs as I just purchased the Trunon sway rig for $500.00 to be 1,step-up from that gvwr."getting rid of the radials and putting on the E's... DEGA BOUND... COME AND JOIN US. THANKS AGAIN!
mtofell1
Explorer
Mar 11, 2019
My 12,000# GVWR 5th wheel has D rated tires that I believe are stamped with 2600# a piece tires. The most I've ever had the trailer axles weigh is around 9000# (+/- 20% to the pin/truck = 2000#) If I were loaded to 100% of GVWR it would be close to max on the tires. If/when I replace I'll likely look into E rated for a bit more breathing room. But, I'm not even sure if the rims are rated for more. It is a bit frustrating that the manufacturer's don't build in more of a margin but I also have to remember there is a factor of safety engineered in to the ratings already.
Huntindog
Explorer
Mar 11, 2019
What size tires and rims are on it now?
6 lug rims?
Edd505
Explorer
Mar 11, 2019
They all use ply ratings any more, the R is for radial vs bias ply. Here is how they size: The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters. ... For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.

Now I'll recommend looking at Yokohama Geolandar in your size. The tire is an LT or light truck vs ST or special trailer. I have run them trouble free on two 5W's about the same size as yours and am almost full time, about 9 months a year. Now we wait for all the naysayers