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Tireman9 · 02-09-2018, 02:08 PM

Quote:

Originally Posted by GettinAway

Ok thanks. I should have said AS "might" sell me a trailer with undersized tires, not "would" sell me such a trailer. I've come to the conclusion that there is no absolutely correct answer for tire pressures. I do appreciate the time and effort you took to explain it to me though.

There is an absolute correct answer for the minimum tire pressure.

Pressure should not be lower than the lowest pressure in the tables for the measured load of the heaviest loaded tire on that axle

GettinAway · 02-10-2018, 06:45 AM

I was getting the impression, although it was never stated, that any pressure other than the maximum, was not recommended due to shear stress. Now I'm getting the impression that tires can be run at less than maximum pressure? Ha! No worries. I know you guys have to be very careful about making any recommendations.

Tireman9 · 02-10-2018, 12:08 PM

Quote:

Originally Posted by GettinAway

I was getting the impression, although it was never stated, that any pressure other than the maximum, was not recommended due to shear stress. Now I'm getting the impression that tires can be run at less than maximum pressure? Ha! No worries. I know you guys have to be very careful about making any recommendations.

There is a difference between "Lowest based on load" and "Suggested for longer belt durability". Life is just a series trade-off.

Milo1952 · 02-14-2018, 08:57 PM

tireman 9

do you approve of the nokians LT's for trailer use or not ??
And if not. which tire would you personally go with for a 2017 AS International 30. I run the trailer on the light side, never getting close to GVWR yet.
I value your professionalism and opinions. Is the GYE a valid option even w/o a proven track record ???

Tireman9 · 02-15-2018, 04:47 PM

Quote:

Originally Posted by Milo1952

tireman 9

do you approve of the nokians LT's for trailer use or not ??
And if not. which tire would you personally go with for a 2017 AS International 30. I run the trailer on the light side, never getting close to GVWR yet.
I value your professionalism and opinions. Is the GYE a valid option even w/o a proven track record ???

Sorry I do not have personal experience with that brand. I am also prohibited from "advertising" any specific products on this forum.

I would however suggest that whatever tire you are considering be able to support at leaset 115% of the heaviest end of the heaviest axle on the RV. If not then IMO that tire should not be on your shopping list.

Have you read my RVTire Blog? I ahev numerous posts on how to select and set tire pressure. You can see my profile "home page"

Muriel 1 · 04-30-2018, 02:22 AM

I’m having JC balance and mount my new Endurance 14 tires in May.
My 23 fb should weigh in at 6200#
The tires are rated at 8800#
Max pressure on sidewall is 65 psi.
I’m thinking 58 psi?
Not to hard and not to soft.
Any thoughts?

Tom

CapriRacer · 04-30-2018, 06:45 AM

Quote:

Originally Posted by Muriel 1

I’m having JC balance and mount my new Endurance 14 tires in May.
My 23 fb should weigh in at 6200#
The tires are rated at 8800#
Max pressure on sidewall is 65 psi.
I’m thinking 58 psi?
Not to hard and not to soft.
Any thoughts?

Tom

First, how did you determine the weight of the trailer?

Let's do some math:

If I assume that the 6200# number is the value on the tires and not the whole vehicle, and I assume that this didn't come from an actual weighing of each tire individually, then each tire would average a load of 1550#.

I need to account for side to side and front to rear variation, so add 15% (I am thinking this number is too conservative and the value might be more like 10%. but let's use 15% for now.) That results in 1783#.

I think tires shouldn't be loaded to more than 85% of their rated capacity = 2097#. That makes it 55 psi.

And since the tires are supposed to be operated at 65 mph max (they are an ST tire!), if you want to tow at 75 mph max, add 10% = 2307#, which is over the rated max of the tire.

Bill M. · 04-30-2018, 07:57 AM

The new Endurance carries a 87 mph speed rating, or close to that.

**Action** · 04-30-2018, 08:29 AM

Quote:

Originally Posted by Bill M.

The new Endurance carries a 87 mph speed rating, or close to that.

For all rim diameters and all sizes??

>>>>>>>>>>Action

Muriel 1 · 04-30-2018, 08:43 AM

Capris Racer
Thank you!
Tom

Muriel 1 · 04-30-2018, 08:46 AM

Capri Racer
I roll at 63 mph max.
Thanks again!
Tom

GettinAway · 05-01-2018, 05:44 AM

I pulled on the interstate and then some very hilly and winding two lane down through the Ozarks last weekend. I’m leaving my GYEs at 75 lbs psi, even though I think that’s way overkill on a 23FB. I was thinking the ride was going to be too stiff. Pulled like a dream, and no popped rivets. The pillows slid off the dinette, but that was it.

Tireman9 · 05-01-2018, 08:43 AM

Quote:

Originally Posted by CapriRacer

First, how did you determine the weight of the trailer?

Let's do some math:

If I assume that the 6200# number is the value on the tires and not the whole vehicle, and I assume that this didn't come from an actual weighing of each tire individually, then each tire would average a load of 1550#.

I need to account for side to side and front to rear variation, so add 15% (I am thinking this number is too conservative and the value might be more like 10%. but let's use 15% for now.) That results in 1783#.

I think tires shouldn't be loaded to more than 85% of their rated capacity = 2097#. That makes it 55 psi.

And since the tires are supposed to be operated at 65 mph max (they are an ST tire!), if you want to tow at 75 mph max, add 10% = 2307#, which is over the rated max of the tire.

^x2 or even ^3

Tireman9 · 05-01-2018, 08:51 AM

Quote:

Originally Posted by Bill M.

The new Endurance carries a 87 mph speed rating, or close to that.

Need to remember that in the US "speed Rating" on tires and especially passenger car tires is really a relative rating of handling and not absolute speed capability. The test is a 30 minute step test so you could probably get away with running full load at 87 for 30 minutes but then just as with the qualification tires the tires are considered scrap after completing the test.

Now if you can get something in writing from Goodyear where they approve of running 100% of tire sidewall load at 87 for thousands of miles then you might consider it but I would never do that.

When I was towing my26' trailer I kept my speed below 65.

VT Wanderer · 05-04-2018, 08:31 AM

Yesterday, May 3, going north on I-81 south of Scranton PA - TOTAL blowout of sidewall - numerous HUGE potholes, and one broke the camels back of our one year old, 5000 miles Endurance. Drove (10mph) the breakdown lane for 1.5 miles to exit and change. Went to tire shop and got replacement - just in case of another incident. The only tire they had with ST E rating was a Tire King - never heard of it.

sb55 · 05-04-2018, 08:49 AM

Quote:

Originally Posted by VT Wanderer

Yesterday, May 3, going north on I-81 south of Scranton PA - TOTAL blowout of sidewall - numerous HUGE potholes, and one broke the camels back of our one year old, 5000 miles Endurance. Drove (10mph) the breakdown lane for 1.5 miles to exit and change. Went to tire shop and got replacement - just in case of another incident. The only tire they had with ST E rating was a Tire King - never heard of it.

Sorry to hear about that. I-81 is awful!
We hit a pothole in the same place in January.
Not a blowout, but we had a bulge in the sidewall.

PeterH-350LE · 05-04-2018, 05:27 PM

Just completed a 3000 mile trip with my new 15" E rated Endurance to Arkansas, Florida and back to Austin
1987 29' Sovereign GVWR 6600#, cold inflation 68 pounds, at towing speeds between 60-70 mph, the psi was ~74, which was in the 10 percent range of cold inflation. Cold tire pressure after 3000 miles 68, 68, 67.5, 68.
I am running 16" Michelin LTX on my 96 30' Excella and was curious to compare them with the new Goodyear Endurance line. Very happy with the performance and handling of the Endurance!

CruizinDux · 05-04-2018, 07:17 PM

New GYE/E'son the 5k bambi ( about 4300 on the axel) I recently completed 7400 mi trip to central cal coast then E and turned the corner WB in Nashville. Started at 80 psi then then 75. IMO not diff that i could tell. Stickin w/80 for the greater margin. Speeds generally at 65 or less, passing spurts aside. Some cold...and some hot weather. Consistent pressure day to day and minimal top off.

Glad i swapped out the gym's before the tripod. Feelin' good...i knew i would 😉

Bob

**wulfraat** · 05-04-2018, 07:39 PM

I am liking the 15” endurance tires after about 4K miles of towing. I run them at 80psi on my 2017 30’ international which is 8,000lbs wet on the cat scales.

Like CruizinDux, I like the additional safety margin and cannot notice a difference in ride quality between 70lbs and 80lbs psi.

Tireman9 · 05-05-2018, 08:35 AM

Quote:

Originally Posted by VT Wanderer

Yesterday, May 3, going north on I-81 south of Scranton PA - TOTAL blowout of sidewall - numerous HUGE potholes, and one broke the camels back of our one year old, 5000 miles Endurance. Drove (10mph) the breakdown lane for 1.5 miles to exit and change. Went to tire shop and got replacement - just in case of another incident. The only tire they had with ST E rating was a Tire King - never heard of it.

Sounds like Impact Break to Run Low flex failure. Have any pictures?

I had impact break a couple weeks ago on LF of my car. Luckily it was discovered before the tire loat air. I took the opportunity to do a "Tire Autopsy" and wrote about it with pictures on my RV Tire Safety blog
"Sidewall "Bubble" or ? A Tire Autopsy" April 27. Sorry not allowed to post direct link but you can check my profile or just GOOGLE the post title.

The autopsy shows the early stages of what would have eventually grown big enough to break through the tire sidewall and I would have had a sudden loss of air.