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Old 10-23-2018, 03:47 PM   #1
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What tires to buy?

Hey all,

I just bought a 1977 31ft airstream international that has been sitting for about 7 years. I have already been advised to have new tires installed on it before I tow it 1000 miles home and I am having trouble finding the tires I need. So here are my questions-

What size tires do I need?

What ply should the tires be?
I was already advised to use 10ply but they are harder to find than 8 ply.
Can I use 8 ply?

Im a newbie and I want to get the right tires before our journey home, any detailed information would be very appreciated.

Thanks!
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Old 10-23-2018, 03:57 PM   #2
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Welcome Aboard!! 👍

Ply's are no longer Ply's...they are ratings. An 8 or 10 ply rated tire doesn't have 8 or 10 ply's. Tires are now rated by the 'load' they can carry.

I'm now using Good Year Endurance 'E' load rating. This was the first Season with them...👍

Bob
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Old 10-23-2018, 04:23 PM   #3
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Just buy a set of the Goodyear Endurance trailer tires. You have 15" wheels unless they have been changed. Check what is there now to see that they are still 15".
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Old 10-23-2018, 04:51 PM   #4
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Main Question:

I guess the main thing I wonder is:

Can we buy 8 ply (as in Class D load capacity)
Or do we absolutely need class E (10 ply)?

Class Es seem harder to find and way pricier. Old tires we are removing are class D.

We will tow this sucker 1000 mikes then park it.
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Old 10-23-2018, 05:08 PM   #5
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On the driver's side front corner of the trailer there should be a placard that says which tire type and the size that was original on the trailer and axle capacity. Each tire should have a load rating that exceeds half the axle load capacity by 15% in case of unequal loading. (axel load/2x~1.15= tire rating) (If you use a passenger tire, not ST, then increase capacity again x ~1.1)

I owned a 1973 and a 1978 31' Excella. I used D rated tires on both, never had any issue.

This is a link to an Owners Manual for your trailer>
https://www.airstream.com/wp-content...0003.0110i.pdf
On page 32 there is a chart showing the original tire sizes.
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Old 10-23-2018, 05:16 PM   #6
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Don't be cheap....Good Year Durance
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Old 10-23-2018, 05:17 PM   #7
CLOUDSPLITTER "Tahawus"
 
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Quote:
Originally Posted by Satchien View Post
I guess the main thing I wonder is:

Can we buy 8 ply (as in Class D load capacity)
Or do we absolutely need class E (10 ply)?

Class Es seem harder to find and way pricier. Old tires we are removing are class D.

We will tow this sucker 1000 mikes then park it.
YES...you can buy D or E in the GY Endurance ST.👍
USA made BTW.

Bob
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Old 10-23-2018, 05:43 PM   #8
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The tires are probably 225 75 15. This is a very common size for 15" trailer tires. Buy decent tires like the Goodyear Endurance tires. Cheap Chinese tires are not what you want for a 1000 mile trip.



I do not want to be the "nattering nabob of negativism" but you need to do some inspections and preventive maintenance before your trip. Before you tow it more than few miles you need to repack the wheel bearings and inspect the brake system. 1977 axles will be shot unless the axles have been replaced in the last 15 - 20 years. Do you have the tools and the skill to repack the wheel bearings, inspect brakes and make repairs? Your trip home with this trailer could be a dangerous trip, for more than you, if you do not inspect and repair the components on the trailer necessary for rolling down the road and stopping safely as needed.


Good luck. Do your research, as you are doing before you take off on your journey.
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Old 10-24-2018, 10:33 AM   #9
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I use Michelin 235x75r 15 on my 23ft, 25 ft and 28ft Airstreams. They are the Defenders, a light truck tire.
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Old 10-24-2018, 02:15 PM   #10
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Quote:
Originally Posted by Satchien View Post
Hey all,

I just bought a 1977 31ft airstream international that has been sitting for about 7 years. I have already been advised to have new tires installed on it before I tow it 1000 miles home and I am having trouble finding the tires I need. So here are my questions-

What size tires do I need?

What ply should the tires be?
I was already advised to use 10ply but they are harder to find than 8 ply.
Can I use 8 ply?

Im a newbie and I want to get the right tires before our journey home, any detailed information would be very appreciated.

Thanks!
Make this your first refurbish job. Check bearings, check wheels, buy new 8 or 10 ply st tires. The Endurance tires spoken of here are top notch. Any number of owners are, or have, switched to 16 inch wheels and LT E rated tires. If you have the time to shop here in classifieds, you may find a set of 15 inch wheels and ST tires for sale.
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Old 10-24-2018, 03:41 PM   #11
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I think the Goodyear Endurance come in a 225x15 load range D (I think your 8 ply rating) and a 235 load range E (I think your 10 ply rating). Either should work on that trailer. I suspect the 225 load range D is the closest to the original tire size and rating. One of the above would be the easy way out and not be too bad a tire. Or you can study up on it and buy something more expensive right up front. Might depend upon whether you re are going to pull 5000 or 30000 miles a year.

Everybody knows the old Goodyear Marathons had some problems. Nobody really knows how the Endurance will be but so far the news about them is all good,
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Old 10-24-2018, 04:50 PM   #12
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Quote:
Originally Posted by Beaubill View Post
I use Michelin 235x75r 15 on my 23ft, 25 ft and 28ft Airstreams. They are the Defenders, a light truck tire.
Micheline does not make a LT in 15" anymore...several posts on this. They have a 15" Defender LTX M/S2, but it is now only offered in a Passenger rated tire.; it is not a true Light Truck tire..that why your seeing all the posts on the new GoodeYear Endurance recommendations. I wish they still offered a true LT in that size...I ran them on my older AS's and loved them. The P rated Michelins in 15" seemed to me, to cause my last AS to "drift", as if the sidewalls were not as sturdy... I switched to the Endurance with my new trailer recently and am very happy.
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Old 10-24-2018, 07:15 PM   #13
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Our gye 225/75 15 E rated are essentially the same size as the gym's they replaced which is one reason i passed on the lt235/75 Nokians, a great tire but at the last min didn't want to deal with the larger tire fit in the spare rack.
I think the d's are a 205/75 15.

We have about 14k miles since this last feb. We run at 75psi as 80 for our 20fc is a bit firm. They ride great and essentially leak no air. the last 2 wk trip i never added air. LOve'm but may look at the nokians again when it's tire time again. Really wanted a LT but very happy with the gye's.
B
ps, the nokians are now made in TN and are becoming more available. I see them around here a lot on ranch trucks and trailers...a good sign
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Old 10-25-2018, 03:53 PM   #14
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I hope we hear how the OP's journey back to Austin went with his "new" Airstream.
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