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Old 01-09-2016, 02:35 PM   #15
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Four of those Pirelli will get you #9,430 of capacity. What are your axle weight ratings or weights when fully loaded for travel? The #8,800 is your trailer's GVWR. That includes tongue weight.
Since they are LT tires you need to derate them by 10%. So that's under my axle weight of 8800 lbs.
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Old 01-09-2016, 02:37 PM   #16
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The Nokian tires support over 10,000 lbs even derated.
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Old 01-09-2016, 02:46 PM   #17
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Since they are LT tires you need to derate them by 10%. So that's under my axle weight of 8800 lbs.
LT tires do not require derating. Only "P" passenger tires require derating.

Unless I'm mistaken and Airstream has their online info wrong, the 8,800 pounds you reference is the GVWR. The Gross Vehicle Weight Rating. Each axle has its own rating. They are listed as FAWR and RAWR, Front Axle Weight Rating and Rear Axle Weight Rating. It is listed on the Tire and Loading information sticker on the side of your trailer. I would guess that your trailer has 4,000 or 4,200 pound rated axles, but you can find that exact information on your trailer.
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Old 01-09-2016, 03:56 PM   #18
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Also - that 8800 is max. Have you weighed it loaded for camping? I'm 1600# below my GVWR fully loaded (including water and propane) for camping. You might see the same. Good luck!
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Old 01-10-2016, 12:53 AM   #19
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LT tires do not require derating. Only "P" passenger tires require derating.

Unless I'm mistaken and Airstream has their online info wrong, the 8,800 pounds you reference is the GVWR. The Gross Vehicle Weight Rating. Each axle has its own rating. They are listed as FAWR and RAWR, Front Axle Weight Rating and Rear Axle Weight Rating. It is listed on the Tire and Loading information sticker on the side of your trailer. I would guess that your trailer has 4,000 or 4,200 pound rated axles, but you can find that exact information on your trailer.
Looks like I am wrong. LT tires do not need derating. So time to reevaluate.

http://www.rvtiresafety.com/2015/03/...their.html?m=1

My trailer has 4400 lb axles per the trailer sticker.
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Old 01-10-2016, 01:02 AM   #20
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Also - that 8800 is max. Have you weighed it loaded for camping? I'm 1600# below my GVWR fully loaded (including water and propane) for camping. You might see the same. Good luck!
I have not weighed my trailer other than knowing it is allegedly 6569 lb from the factory per the weight sticker.

With a 54 gal fresh tank @ 8.34 lb/gal I'm looking at another 450 lbs of base weight, so 7000 lbs as I usually run with a full fresh tank (and the rest empty).

I'm not full time and travel light otherwise so yea, I'm likely well within spec of any of these tires.

But I would still feel most comfortable accounting for 8800 lbs.
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Old 01-10-2016, 02:30 AM   #21
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Over the years we have seen a couple of tires that would loose their tread due to trailer use.
Have you tried the Pirellis?
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Old 01-10-2016, 08:47 AM   #22
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I know someone who has used the Pirellis on his Airstream for the past 4 yrs. I thought they quite making them is why I did not consider using them. He loves them and has put many miles on them. I might use them myself now that they are available again.
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Old 01-10-2016, 09:29 AM   #23
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The axles on the FC 30' Bunk should be rated 4,500 pounds each, as I remember seeing in the parts book.

BTW. The parts books have disappeared from the Airstream website using an iPad.
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Old 01-10-2016, 09:47 AM   #24
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As much as I'd love to use the Michelins (I have them on my truck already), they are only rated at 2205 lbs. That's just cutting it, and doesn't account for the 10% derating that's required.

Then again, my trailer isn't near 8800 lbs but still...


Hi Scott

Rich Luhr who publishes Airstream Life has the same unit as you do, likely loaded heavier and he tows extensively. He replaced 15 marathons in the first 5 years he owned it. 6 years ago I convinced him to put 235 Michelins on, those 4 are still on today.

We have these Michelins on at least 100 30 and 31 Classics which are heavier than your Flying Cloud and just never a problem even for customers that do high miles and high speeds. So they do have a pretty proven track record if that helps.

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Old 01-10-2016, 09:47 AM   #25
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The axles on the FC 30' Bunk should be rated 4,500 pounds each, as I remember seeing in the parts book.

BTW. The parts books have disappeared from the Airstream website using an iPad.
Definitely 4400 lbs on the 2014 model. I looked at the sticker on the trailer.
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Old 01-10-2016, 09:52 AM   #26
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As much as I'd love to use the Michelins (I have them on my truck already), they are only rated at 2205 lbs. That's just cutting it, and doesn't account for the 10% derating that's required.

Then again, my trailer isn't near 8800 lbs but still...


Hi Scott

Rich Luhr who publishes Airstream Life has the same unit as you do, likely loaded heavier and he tows extensively. He replaced 15 marathons in the first 5 years he owned it. 6 years ago I convinced him to put 235 Michelins on, those 4 are still on today.

We have these Michelins on at least 100 30 and 31 Classics which are heavier than your Flying Cloud and just never a problem even for customers that do high miles and high speeds. So they do have a pretty proven track record if that helps.

Andrew T
That's a good testimonial.
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Old 01-10-2016, 10:06 AM   #27
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On my individual wheel scales, only one of the four Classic tires was carrying a load below the 1,983 pound derated load of the 15" Michelins. The axles are supporting nearly 8,200 pounds camping ready. Thus we have the 16" Michelins installed.

Our 25FB had 5,860 pounds on the axles camping ready. The installed 15" Michelins worked fine. The 23D has an even lower GVW so the 15" Michelins are carrying only 5,540 pounds on the axles.

I think the 15" Michelins would be fine on 25' to 28' Airstreams and the tri-axle models. Some single axle models really need the 16" Michelin like on the 5,000 pound axle of the 19' model.
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Old 01-10-2016, 10:09 AM   #28
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Going to try to summarize this a bit, if for myself only.

Pirelli Scorpion ATR 235/75R15, load range D, 2335 lb each, 9340 lb total, 6% safety margin over 8800 lbs. $460 at tirerack. $675 local at STS.

Michelin LTX MS/2 P235/75R15/XL, 108T, 2205 lb each, derated to 2,004 lbs, 8016 lb total. Negative safety margin on 8800 lbs. Around $500.

Still not sure I can get the Nokian's locally.
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