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Old 07-28-2014, 08:00 AM   #631
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A closer view of the 16-inch wheels and Michelin LTX tires.
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Old 07-28-2014, 11:04 PM   #632
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Unlikely/challenging you'll have adequate load capacity with 15" LT tires. Curious to see if that happens.
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Old 07-29-2014, 05:42 AM   #633
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Quote:
Originally Posted by interstateflyer View Post
We just took delivery of a 2014 International 23D to replace our 2013 International 19.

We upgraded the 19 with 16" wheels and Michelins shortly after purchasing.

The 23D has 14 inch load range C Marathons with rubber stems. Doesn't Airstream listen to their customers?

I'd like to replace the 14 inch wheels with 15s and Michelin LT M/S. Has anyone done this on a 23D?
I think I saw a thread about taking the 14"s to 15". It was a year or more ago. I think it's possible. I've just decided to keep the 14"s for now. I'm interested in anything you find out though. It's too bad we can't use some of these 15"s that theses guys are taking off to go to the 16"s, but I believe the lug pattern is different.
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Old 07-29-2014, 11:29 PM   #634
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A number of us with 23' trailers have upgraded from the stock 14" up to 15" wheels primarily to get better tire options, including the Michelin's. We went with Sendel T02's to keep the original look. The 5-bolt pattern on these 23' trailers rules out the 15" wheels are others are trading out for 16" wheels because they are 6-bolt pattern. In my opinion the 15" wheels and tires are more than adequate because the 23' trailers have the lowest weight per axle of any current Airstream. For us it has meant peace of mind, and we think the larger wheel/tire combo is better looking, too. Happy we did it.
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Old 07-30-2014, 12:49 AM   #635
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Quote:
Originally Posted by GettinAway View Post
I think I saw a thread about taking the 14"s to 15". It was a year or more ago. I think it's possible. I've just decided to keep the 14"s for now. I'm interested in anything you find out though. It's too bad we can't use some of these 15"s that theses guys are taking off to go to the 16"s, but I believe the lug pattern is different.

I drove from Alaska to Arizona last year to pick up an Airstream Safari 28 with 15" wheels and immediately changed them to 16" because of wonderful advice from folks on this forum. It may interest you to know that I originally planned to acquire an Airstream 23' and contacted the Airstream folks in Ohio, who gave me the go-ahead to change to 16" tire/rims. The 28-footer suited me better, and I drove back home to Alaska solo via the Alaska Highway with no problems and happier than a clam to have made the switch to 16-inch Michelin LT load range E if nothing else but for safety and peace of mind!!
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Old 07-30-2014, 07:39 AM   #636
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Wheel and tire size vs capacity

Like many I have made the switch to 16 inch w/Michelin Rib LT tires on a 28 foot rig. I could not get comfortable that my loaded per wheel cavity was sufficient to stay on 15 inch C or D LR tires. I have been told my a number of fleet operators that LRs are not an exact science and one needs to provide a safety margin for extended travel. When queried I was told and I agree with this after over 20 blow outs in the last 5 years, that the LR spec does not include extended (more than 1 hour) runs at 65 mph in ambient temperatures exceeding ISA plus 25 on imperfect asphalt where surface temperatures exceed ambient by over 50 degrees. Put another way, I-20 near New Orleans, in Summer at 100F, and road temps of 150F will reduce the effective LR by at least 20% if the tire has already run an hour or two. The transient loads as you traverse chuck holes and pavement breaks soar creating stresses for which trailer tires are never tested. LT tires are tested for classification purposes but the extent to which they can take this stress level is a function of the manufacturer's aversion to liability and not because they want publicity for the strongest tire built as the truck manufacturers might.
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Old 07-30-2014, 08:25 AM   #637
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This link to the SenDel wheels used by Airstream

T03SM | Sendel Wheels

shows both a 14" and 15" wheel with the same 5/4.50 bolt circle and number of bolts, same 3.19" center bore and same zero offset. The 14" wheel has a 1,900 pound load rating at 60 psi and the 15" has a 2,150 pound load rating at 60 psi.

The larger bolt circle 6/5.5 15" and 16" wheels have the same number of bolts, zero offset, and 4.25" center bore. The 15" wheel is load rated 2,830 pounds at 80 psi and the 16" wheel is load rated 3,580 pounds at 80 psi.
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Old 07-31-2014, 05:38 AM   #638
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Quote:
Originally Posted by switz View Post
This link to the SenDel wheels used by Airstream

T03SM | Sendel Wheels

shows both a 14" and 15" wheel with the same 5/4.50 bolt circle and number of bolts, same 3.19" center bore and same zero offset. The 14" wheel has a 1,900 pound load rating at 60 psi and the 15" has a 2,150 pound load rating at 60 psi.
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Hmmm, nice change. I wonder if there's a market for my used 14" wheels.
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Old 07-31-2014, 08:53 AM   #639
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Farm wagon?
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Old 07-31-2014, 09:37 AM   #640
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Hmmm, nice change. I wonder if there's a market for my used 14" wheels.
Maybe. We sold our 15" wheels/tires to a fellow with another brand camper and he was happy to have them, replacing his steel wheels. They were like new condition. Advertise the size, bolt pattern, offset.
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Old 08-04-2014, 08:36 PM   #641
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For my 2014 23D.....I'm looking at the Sendel T03SM 15x6 5-4.50 114.3 trailer wheels to replace the 14s.

It looks like Michelin offers this model 15 inch tire: Michelin LTX M/S 2 P235/75R15 108T XL W. I've run the 16 inch Load Range "E" version of the LTX M/S on trucks and on my 2013 AS International 19.

Has anyone had experience with the Load Range "XL" version. I'm wondering how this might differ from the Load Range "E" version of the LTX M/S?

I also noticed that the 15s have a "P" designation instead of "LT".
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Old 08-04-2014, 09:15 PM   #642
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I run the p235xl 15 inch LTX tires on my 25 foot trailer and load range E Michlen tires on my truck. They do not compare at all. Load range E is a very heavy tire that goes to 80 psi. The XL tires best compare to a load range C and max out at 50 psi. Derated for trailer use the p235's are good to 1985 lbs at 50 psi. Previously Michlen made a load range C LT tire in 15" size but dropped it. I suspect the XL tire is very similar to the former LT tire in construction.
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Old 08-04-2014, 09:48 PM   #643
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I used the Michelin LTX (P) 235/75R15 XL tires (2,183 pounds @ 50 psi derated to 1,985 pounds 28.9" 4 x 1985 = 7,940 pounds 4 x 2,183 = 8,732 pounds) on the factory rims on my 2013 25FB International Serenity. The tire gives that trailer an amazing increase in tread patch contact on the road for better braking than the ST tire. The Michelin tires were supporting about 5,900 pounds when the 25FB trailer was loaded for camping. The 25 series have a 7,300 pound GVW and the 27/28 series have a 7,600 pound GVW. The 15" Michelin would work on either series.

Click in "Images" below my avatar and see the low mileage (drive from Los Angles dealership to storage unit in Phoenix area) ST tire beside the newly mounted 15 " Michelin tire and well as the low milage tire ST tire from the Classic (factory in Ohio to Phoenix dealership) next to a newly mounted 16" Michelin LT225/75R16/E LTX M/S2 tire on a SenDel T03-66655T aluminum wheel.

Note that the apparent difference in height between the GoodYear ST and Michelin tires is in the diameter, the trailer height is Ĺ of that difference.

Goodyear 15" ST diameter 28.3"
Michelin 15" Diameter 28.9"
Michelin 16" Diameter 29.2"
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Old 08-05-2014, 11:22 AM   #644
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I'm wondering if I'd see a significant benefit in purchasing new 15 inch wheels and Michelin LTC LR "XL" tires to replace the original 14 inches ST LR "C" tires my 23D.

My primary concern are: tires more suitable for hot weather and rough roads and less propensity for blow outs (than Goodyear Marathons).

I liked the 16" LTX M/S on my International 19 because they were durable and could be aired up to 77-80 pounds for additional cooling benefits.
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