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Old 10-03-2013, 07:25 PM   #1
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Need new tires

I have a new to me '78 Tradewind. Among many things that need to be improved, the tires are a must-do-now. There are 2 sets of different tires.
(2) Kelly P215.70R15, and (2) Firestone P205.70R15. The Kelly's look almost new, but the Firestones are much older, and one looks like it's a bit dry-rotted.

Having read numerous posts here, I really don't know what to buy.

Can someone please help?

Thanks,

TMT
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Old 10-03-2013, 07:34 PM   #2
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I like my Michelin XLT M/S2 in P235/75R15 XL. I note to my concern that Michelin shows this as "limited availability" (I'm concerned since I don't feel that our light '70s trailers need the extra capacity you get from 16s, hopefully they'll keep producing this size).

Of course ST tires are an option, but I think the Michelin is a better tire and has more than ample capacity for my trailers and yours.
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Old 10-03-2013, 07:54 PM   #3
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Quote:
Originally Posted by TMT View Post
I have a new to me '78 Tradewind. Among many things that need to be improved, the tires are a must-do-now. There are 2 sets of different tires.
(2) Kelly P215.70R15, and (2) Firestone P205.70R15. The Kelly's look almost new, but the Firestones are much older, and one looks like it's a bit dry-rotted.

Having read numerous posts here, I really don't know what to buy.

Can someone please help?

Thanks,

TMT
The answer is, neither. The tires that are supposed to go on your trailer are either 225/75 15, or 7.00x15, both in load range D. Neither of the tires you are asking about are the correct size or load range. If you really want a lighter-duty tire, you can see if you can find the above-referenced Michelin LTX in 235/75 15, load range C, but that is still far beyond what you are considering.
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Old 10-03-2013, 08:01 PM   #4
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I can and will replace all 4. Just need to know what to replace with.
Size, load range, etc. Doesn't have to be a trailer tire, but does need to be the correct tire! :-)
Thanks for any and all advice!
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Old 10-04-2013, 07:20 AM   #5
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I can and will replace all 4. Just need to know what to replace with.
Size, load range, etc. Doesn't have to be a trailer tire, but does need to be the correct tire! :-)
Thanks for any and all advice!
First, we need to establish what the original tire size was. I'm a tire guy, not an Airstream expert. So someone with historical background needs to step in here.

Second, I don't have a good feel on how well older Airstreams were relative to tire sizing. Other trailer manufacturers were either marginal or even undersized.

Personally I would weigh the trailer - fully loaded, water tanks full, everything you can possibly think of that you would carry. You are looking for a worst case.

What you are looking for is the highest tire loading - which means you need to weigh each tire individually. If you can't, I'd recommend adding 10% to the axle values or 15% if you weigh both axles at the same time.

I also recommend not loading the tire to more than 85% of the rated value.

In all likelihood, this is going to require more work than you anticipated, but in the end, a single tire failure causes much much more headaches. You want to avoid those at all costs.
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Old 10-04-2013, 07:37 AM   #6
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Your tire type should either be special trailer tires ST or light truck LT not regular car tires. You can tow a LT tire at a higher speed without overheating.

Also tire condition cannot be assessed by appearance alone. Trailer tires are occassionally used and often look good. The consensus is a tire over 5 years old has begun to deteriorate. There is a month and year stamp on the side wall of each tire which will tell you when it was manufactured
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Old 10-04-2013, 07:48 AM   #7
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Many here use Michelin LTX P235 75 15 XL on their trailers. Andy at Can-Am Airstream recommends them to his customers.

I put these tires on our trailer after listening to people like Capriracer & Andy. Have been very happy with them.
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Old 10-04-2013, 07:57 AM   #8
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Either the Michelin XLT M/S2 in P235/75R15 XL or the Goodyear Marathon ST tires would be a very good choice. My opinion is that if you are going to pull it a whole lot, as in months and months and thousands and thousands of miles a year go with the Michelins. If it is going to sit mostly and just be pulled some go with the GYM. The Michelins will be around $700, the GYMs around $500. Get them balanced. If you are ever going to add a TPS get the correct valve stems for that.
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Old 10-04-2013, 08:16 AM   #9
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Many good reviews with these....no 16" wheel up-grade needed.

Bob
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Old 10-04-2013, 11:17 AM   #10
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Quote:
Originally Posted by CapriRacer View Post
First, we need to establish what the original tire size was. I'm a tire guy, not an Airstream expert. So someone with historical background needs to step in here.

s.
I already did, and the OP chose to ignore it.
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Old 10-04-2013, 11:32 AM   #11
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Confused?

Quote:
Originally Posted by ROBERT CROSS View Post
Many good reviews with these....no 16" wheel up-grade needed.

Bob

Hi, on this link, the tires are listed as a "P" tire and described as light truck tires???????????
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Old 10-04-2013, 11:54 AM   #12
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Hi, on this link, the tires are listed as a "P" tire and described as light truck tires???????????
Robert,

When I first noticed that, I jumped to the spec sheet to check the load rating.

Bob
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Old 10-04-2013, 12:12 PM   #13
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I believe both of these are D rated.

http://www.ebay.com/itm/4-NEW-205-75...623814&vxp=mtr

4 New 225 75 15 Goodyear Marathon Radial Trailer 75R R15 Tires | eBay
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Old 10-04-2013, 04:02 PM   #14
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Quote:
Originally Posted by overlander63 View Post
I already did, and the OP chose to ignore it.
Was there a question here to me?
I'm not sure.
Thanks for your help.
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