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Old 06-07-2013, 08:08 PM   #15
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The GVW on our 25FB International Serenity is 7,300 pounds. The Shureline scale reports the tongue weight as 1,175 pounds. When I crossed the scales all loaded for a trip, the trailer axles were carrying 5,880 pounds. Thus, the Michelin LTX (P) 235/75R15 XL tires are more than adequate for this application.

We have a 2014 Classic 27FB on order with a GVW of 9,000 pounds. The 15" Michelins are not adequate for this loading. I will install five Michelin LT 225/75R16E M/S2 tires on five SenDel T03-66655T rims for the new rig.

I will buy the tires at Costco, just like I did the 15" tires. I had them install new tires on the original wheels. The installers all knew that GYM ST tires are unsafe and that these 15" Michelins were the best choice. The trailer was in it's storage facility ten miles away. I brought two in at a time, leaving the spare on each side while the two new tires were installed. The spare was done last.

For the new trailer, I will bring in five new bare wheels to Costco. No issues. Then I will go to the trailer and put all five tires and wheels on by myself.
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Old 06-07-2013, 08:21 PM   #16
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A real tire store with the owner in the store is the best option.

If you need to explain what the rims are for you have a 1990 1/2 ton Suburban 4x4.

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Old 06-07-2013, 08:34 PM   #17
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If you need to explain what the rims are for you have a 1990 1/2 ton Suburban 4x4.

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After we ran int the same issue last week with a friend's tires (he made the mistake of saying the "T" word), I bundled him and the tires up in my truck, and we went elsewhere. I told the kid at the counter at the next place they were going on a Blazer. No problem.
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Old 06-07-2013, 08:49 PM   #18
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Quote:
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We have a 2014 Classic 27FB on order with a GVW of 9,000 pounds.
I'm sorry to get off topic here, but i nearly choked on this number. The weight of our 1957 26' overlander is #3280, almost 1/3 of the weight of a 2014 in nearly the same length.

incredible, eh?
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Old 06-07-2013, 08:51 PM   #19
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I'm sorry to get off topic here, but i nearly choked on this number. The weight of our 1957 26' overlander is #3280, almost 1/3 of the weight of a 2014 in nearly the same length.

incredible, eh?
And the cargo carrying capacity is probably almost double the new trailer. I've seen a few models with less than 100# cargo capacity.
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Old 06-07-2013, 09:17 PM   #20
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I would guess the 100# cargo capacity was supposed to be 1,000#. The 9,000 GVW of that Classic 27FB reflects over 700 pounds of solid Hickory woodwork in all the cabinets, two 40 pound gas tanks, 54 gallons of water with a literature payload of 2,328 pounds, or 2/3 of the GVW of the 1957 Overlander trailer. Also, the longer newer models are typically 6" wider than the older units.
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Old 07-23-2013, 03:58 PM   #21
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We had our first flat tire on 2007 Classic 30' trailer and my husband who is a farmer and can usually get bolts off without trouble cannot loosen these. Your suggestions would be helpful.
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Old 07-23-2013, 04:34 PM   #22
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Bought my tires on the Internet from Discount Tire Direct. They have agreements in many locales for different dealers. In my area it was National Tire and Battery (NTB). I brought the wheels and tires to them along with my receipt from Discount Tire. The charge was $16 each for mounting and balancing. They never asked what I was putting them on.

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Old 07-23-2013, 04:45 PM   #23
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We had our first flat tire on 2007 Classic 30' trailer and my husband who is a farmer and can usually get bolts off without trouble cannot loosen these. Your suggestions would be helpful.
Big honkin cheater bar. With proper leverage you can move a mountain.
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Old 07-23-2013, 04:52 PM   #24
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We had our first flat tire on 2007 Classic 30' trailer and my husband who is a farmer and can usually get bolts off without trouble cannot loosen these. Your suggestions would be helpful.
A 3/4" drive breaker bar with a three foot cheater extension has always worked pretty well for me.

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Old 07-23-2013, 06:18 PM   #25
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I just had Michelin P235/75R/15 LXT S/M installed on my trailer - they say they're rated for 2183 lbs., not 1985 lbs. That's 8740 lbs. total - gives me a 150% safety factor. Tell me again why I need 16"? Like the softer 50# for the old girl!
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Old 07-23-2013, 06:30 PM   #26
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Quote:
Originally Posted by NJtoNC

I'm sorry to get off topic here, but i nearly choked on this number. The weight of our 1957 26' overlander is #3280, almost 1/3 of the weight of a 2014 in nearly the same length.

incredible, eh?
That would be an average increase proportional to a American today from 1957 also...
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Old 07-23-2013, 06:36 PM   #27
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On various tire threads, there have been reports of some tire dealers refusing to mount LT tires on trailers. If I recall correctly, Costco and Discount have been mentioned, but some stores will do it and others won't.

You could tell them Airstream uses them on some models as standard equipment—the Eddie Bauer comes to mind. They also mount them on other trailers if you ask them to. I had no problem at the Airstream service center. But some dealers will look in their book and refuse to mount them anyway. Then you either bring in the wheels and tires and lie about where they are going or go elsewhere.

In my experience Discount has the best prices and some of their lots are too small for a trailer anyway, so I would just bring them the wheels and new tires and tell them to mount and balance them, take them home and put them on the trailer. Since it is easier to just do one side at a time, two trips are necessary.

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Old 07-23-2013, 09:03 PM   #28
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Siler Hawk:

This is the reason the 15"Michelins are derated from 2,183 pounds on the sidewall to 1,985 pounds for the trailer or truck utilization:

49 CFR 571.110
Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity information for motor vehicles with a GVWR of 4,536 kilograms (10,000 pounds) or less.

S4.2.2.1
Except as provided in S4.2.2.2, the sum of the maximum load ratings of the tires fitted to an axle shall not be less than the GAWR of the axle system as specified on the vehicle's certification label required by 49 CFR part 567. If the certification label shows more than one GAWR for the axle system, the sum shall be not less than the GAWR corresponding to the size designation of the tires fitted to the axle.

S4.2.2.2
When passenger car tires are installed on an MPV, truck, bus, or trailer, each tire's load rating is reduced by dividing it by 1.10 before determining, under S4.2.2.1, the sum of the maximum load ratings of the tires fitted to an axle.

S4.2.2.3
(a) For vehicles, except trailers with no designated seating positions, equipped with passenger car tires, the vehicle normal load on the tire shall be no greater than 94 percent of the derated load rating at the vehicle manufacturer's recommended cold inflation pressure for that tire.
(b) For vehicles, except trailers with no designated seating positions, equipped with LT tires, the vehicle normal load on the tire shall be no greater than 94 percent of the load rating at the vehicle manufacturer's recommended cold inflation pressure for that tire.

There was about a 125% safety factor on my 25FB International (GVW 7,300 pounds and 5,880 pounds on the trailer axles loaded for camping) using the 15" Michelins along with Centramatics wheel balancers.
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