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Old 03-08-2016, 12:25 PM   #57
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No need to go beyond adequate load ratings when changing tire sizes, and it may result in a stiffer sidewall and rough ride for your Airstream. Over time it will suffer.
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Old 03-09-2016, 08:54 AM   #58
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If the two tire ratings on an axle exceed the axle's rating and there is an incident caused by a tire issue, that is a much different story than having the two tire ratings less that the axle's rating.

Airstream puts two GYM ST225/75R15D tires rated 2,540 pounds @ 65 psi on their 5,000 pound rated axles. That meets the standard in the industry for the numbers, but not necessarily quality.
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Old 03-09-2016, 05:00 PM   #59
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Carlisle tire has st225/75R15 E 2830@80psi I have used their 16" on my 4 slant horse trailer GVW 11000lb with no problems I am thinking off using the 225 on my 23D do you think that is over kill
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Old 03-09-2016, 06:22 PM   #60
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That's what I currently have on my 34. Carlisle E rated ST225/75/15's
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Old 03-10-2016, 08:00 AM   #61
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The Carlisle ST225/75R15 E tire rated 2830 pounds @ 80psi may be too stiff for a 23D.

Camping Ready 2015 23D on my scales 9 May with extensive modifications - solar &b lithium battery etc.

Tongue………928
Front….1,280……1,246 - total front axle 2,526
Rear…..1,376……1,233 - total rear axle 2,609
Total Axles………………………………….5,135
Total Trailer….6,063

By the time the tire pressure would be reduced by experimentation watching a TPMS for pressure rise and temperature rise, you may have lots of rivets on the floor. That tire might be be okay on a 31' Airstream trailer and even then might have to be be run at reduced pressure.

We run the 16" Michelin LT225/75R16/E LTX M/S2 tire rated 2,680 pounds at 80 psi at 75 psi on our 31' 2014 Classic.
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Old 03-18-2016, 01:58 PM   #62
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Switz, thank you for the shopping list. I am in the process of putting it all together for our 2015 27fb International.
Since we are about 7000lbs with approximately 1000 of it on the tongue, where might I set tire inflation on the 16s?
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Old 04-25-2016, 08:24 AM   #63
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I just complete an upgrade to the 16 inch Michelin's with new wheels. I also included centramatics all around and TST's internal tire pressure monitoring system. I will be doing a post including pictures of the upgrade soon.
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Old 04-26-2016, 09:20 PM   #64
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The upgrade to 16" Michelins and Sendel Wheels was just made to our 'L'l Darlin'. She was towed about 50 miles today just to the shop and back to inside storage. Next upgrade is an outdoor shower. It will take pressure off the grey tank while boondocking.
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Old 04-26-2016, 10:44 PM   #65
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16" upgrade

I just upgraded my 15" OEM wheels and GYM tires to 16" Sendel T03 wheels with black accents and the tires to Michelin LTX 225/75 16 MS2's on my 2007 19' Bambi. Purchased at our local Discount Tire. They would not install my Centramatic 221 balancers because they were not hub centric, in other words the hub opening in the balancer was bigger than the hub and they claim that it could lead to loosening of the wheel from hub. Has anyone else had a similar experience and how important is it for the Centramatics to fit the hub exactly? i will now have to have someone else install the Centramatics. Upgrades seem to always be a challenge. Also, Switz if you are following this thread, I spoke with Jerry at Centramatics and he assured me that there was no difference in performance between the 221's and 356 balancers on 16" wheels so I decided to keep the 221's and give them a try. He also said the hub centric issue was a non issue. Another question for someone with experience is what pressure should I run in the tires to avoid rivets popping?
Thanks,
Ken
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Old 04-26-2016, 11:02 PM   #66
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Quote:
Originally Posted by pkm123 View Post
I just upgraded my 15" OEM wheels and GYM tires to 16" Sendel T03 wheels with black accents and the tires to Michelin LTX 225/75 16 MS2's on my 2007 19' Bambi. Purchased at our local Discount Tire. They would not install my Centramatic 221 balancers because they were not hub centric, in other words the hub opening in the balancer was bigger than the hub and they claim that it could lead to loosening of the wheel from hub. Has anyone else had a similar experience and how important is it for the Centramatics to fit the hub exactly? i will now have to have someone else install the Centramatics. Upgrades seem to always be a challenge. Also, Switz if you are following this thread, I spoke with Jerry at Centramatics and he assured me that there was no difference in performance between the 221's and 356 balancers on 16" wheels so I decided to keep the 221's and give them a try. He also said the hub centric issue was a non issue. Another question for someone with experience is what pressure should I run in the tires to avoid rivets popping?
Thanks,
Ken
Ken,

You wouldn't happen to have a picture with your new 16'' installed that you would mind posting? I'm going with the black accents because the silver wheels are backordered and I'd like to get them installed before we had back to Alaska. It's not a showstopper I'd just like see what they look like as we have similar trailers (mine is a 20FC).

Thanks,

James
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Old 04-27-2016, 03:57 AM   #67
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Michelin LT225/75R16/E LTX M/S2 tires are rated 2,680 pounds @ 80 psi and are 29.2" in diameter. Michelin P/N 05681

4 x 2,680 = 10,720 pounds $1,187.69 at CostCo when I bought five and had them mounted on the provided SenDel wheels. Tire load versus air pressure table is below for this particular size tire. The letters C, D, and E are the load range letters usually associated with that load capacity tire.

80psi 2,680 (E)
75psi 2,560
70psi 2,440
65psi 2,335 (D)
60psi 2,190
55psi 2,060
50psi 1,940 (C)
45psi 1,790

With a 4,500 GVW on a 19' Airstream, perhaps 72/73 psi where the load capacity is about 2,500 pounds would work with a 20% safety margin. Use the private message system to contact "Phoenix" who has a 19" and was early adopter of this tire and has kept a tire failure questionnaire up for many years.
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Old 04-27-2016, 12:41 PM   #68
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I am not going to search for them, but there are threads on this subject where members (or a member) who appear to be knowledgeable about tires have stated that when light truck or passenger tires are used on a trailer, the max load must be derated by a certain percentage. I don't remember the exact number, but it is less than the 20% Switz uses in the above post. So his figures should work fine.

Ken
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Old 04-27-2016, 02:00 PM   #69
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I have run 16"s LRE at 80PSI on the Bambi for eight years and have never had a problem. I am much more concerned about under inflation than over inflation, especially on a single axle trailer.
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Old 04-27-2016, 11:29 PM   #70
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James,
Here are the pictures you requested. I think the black accents look great. I think they use or used them on Eddie Baur editions. I also added centramatic balancers at the same time. Lots of different opinions on there effectiveness but was able to buy a 2 221's from Centramatic for $100.00 plus $14.00 shipping so what the heck.

Ken
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