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Old 02-23-2013, 10:06 PM   #1
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Lightbulb 1967 Axle and Tire Replacement Recommendation

First off, I am new at this. i recently bought a 1967 airstream ambassador and am in the process of ordering new axles from Inland. The current tires likely need to go to but i wanted to get some recommendation for this vintage. They currently have a set of 6 ply 15 X 7LT tires (in really good shape) on what appears to be the original set of rims. What tires would best replace these? Radials/bias ply?
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Old 02-24-2013, 06:40 AM   #2
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Hi! and welcome! There are varying opinions on tires. This is one of my favorite threads:
http://www.airforums.com/forums/f438...res-29435.html
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Old 02-24-2013, 08:05 AM   #3
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Nomad,

Eljay gave you a link to a very long thread - and unfortuantely, it has some bad information in it - and in partcular from Andy at Inland RV Center.

So allow me to start over.

You have a trailer with a 7.00-15LT. I'm going to guess the tire is a 6 Ply Rating - now known as a Load Range C. You need to check that, because the load carrying capacity is extremely important as overloaded tires can fail - and fail catastrophically with little warniing.

7.00-15's are a little hard to find. Your best source is the internet as the local tire store probably doesn't even know what those are.

But there are some alternatives that may be a bit easier to find - so here's the math:

A 7.00-15LT Load Range C is 29.6" in diameter, 8.0" wide on a 5.5" rim, with a load carrying capacity of 1710# at 45 psi (50 for radial tires)

An ST205/75R15 Load Range C is 27.1" in diameter, 8.0" wide on a 5.5" rim, with a load carrying capacity of 1820# at 50 psi. A side note: You can also use a Load Range D - if you decide to go the ST direction I would recommend that you do.

Now some folks are not fans of ST type tires and may recommend an LT235/75R15 Load Range - which is 28.9" in diameter, 9.3" wide on a 6.5" rim (it doesn't fit on a 5.5" rim) and has a load carrying capacity of 1985# at 50 psi. Please note the width and the rim width issue.

And here is where Andy was wrong: Youy CAN use a higher Load Range IF the load doesn't change. It isn't the tire that causes wheels to fail - it's the load. And so long as you are using the same load on the wheel, it doesn't matter how high in Load Range you go.
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Old 02-24-2013, 09:29 AM   #4
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Tires

Quote:
Originally Posted by Nomad_Tex View Post
First off, I am new at this. i recently bought a 1967 airstream ambassador and am in the process of ordering new axles from Inland. The current tires likely need to go to but i wanted to get some recommendation for this vintage. They currently have a set of 6 ply 15 X 7LT tires (in really good shape) on what appears to be the original set of rims. What tires would best replace these? Radials/bias ply?
Hi Nomad,
Capri Racer knows what he is talking about.

I use, and highly recommend, the Michelin LTX M/S2 P 235/75/15 XL tires. If you are looking for something more original looking, then I recommend the Yokohama RY 215 7r15LT

Have fun!
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Old 02-25-2013, 06:47 AM   #5
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1967 Axle and Tire Replacement Recommendation

Thanks everybody.

Sounds like the big winner is the Michelin LTX M/S2P 235/75/15XL, but i will be needing new rims to boot..? The original rims are 15X5.5 and these tires require 15X6.5 ? Guessing my local tire shop could confirm but you guys are more credible.

Presumably there are no clearance issues....the current tires seem like a pretty tight fit....
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Old 02-25-2013, 08:05 AM   #6
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Originally Posted by Nomad_Tex View Post
Thanks everybody.

Sounds like the big winner is the Michelin LTX M/S2P 235/75/15XL, but i will be needing new rims to boot..? The original rims are 15X5.5 and these tires require 15X6.5 ? Guessing my local tire shop could confirm but you guys are more credible.

Presumably there are no clearance issues....the current tires seem like a pretty tight fit....

I would check the clearance very carefully BEFORE pulling the trigger.
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Old 02-25-2013, 08:44 AM   #7
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Quote:
Originally Posted by Nomad_Tex View Post
First off, I am new at this. i recently bought a 1967 airstream ambassador and am in the process of ordering new axles from Inland. The current tires likely need to go to but i wanted to get some recommendation for this vintage. They currently have a set of 6 ply 15 X 7LT tires (in really good shape) on what appears to be the original set of rims. What tires would best replace these? Radials/bias ply?
Here is a reference to a nice looking tire that is in your fitment “Ball Park”

http://www.tirerack.com/tires/tires.jsp?tireMake=Goodyear&tireModel=Cargo+G26&si dewall=Blackwall&partnum=97R5G26&tab=Specs

BA
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Old 02-26-2013, 06:21 PM   #8
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Not to belabor the point but it looks like I found a tire that is the exact same dimension as my current 15 x 7....the Carlisle Sport Trail ST205/90 R 15. Anybody have any experience with these? Apparently Carlisle is owned by Goodyear.
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Old 02-26-2013, 06:22 PM   #9
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Load range D.
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Old 02-27-2013, 06:59 AM   #10
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Not to belabor the point but it looks like I found a tire that is the exact same dimension as my current 15 x 7....the Carlisle Sport Trail ST205/90 R 15. Anybody have any experience with these? Apparently Carlisle is owned by Goodyear.

Good find, but I think you'll find that Carlisle is its own company. They may farm out the making of tires to Goodyear (I doubt it!), but would be the exyent of their relationship.
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Old 02-27-2013, 07:13 AM   #11
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Quote:
Originally Posted by Nomad_Tex View Post
Not to belabor the point but it looks like I found a tire that is the exact same dimension as my current 15 x 7....the Carlisle Sport Trail ST205/90 R 15. Anybody have any experience with these? Apparently Carlisle is owned by Goodyear.
I bought a set of these (LR-C) at Discount Tire before I towed my '51 Flying cloud home from the Florida panhandle. It was the least expensive "get home" option that would fit. It was just a few weeks ago. The tires felt unusually warm after a long stretch of road. I was towing at 55MPH and the ambient temps were in the mid 50s to 60s. After I got back and weighed the trailer I had 2,680 pounds on the axle. I know some people that love bias ply tires. The Carlisle Sport trail in particular. I will be replacing them with a set of Continental Vanco 2 215/70/15 LR-D before any extended towing in high temps.

Good luck!
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Old 02-27-2013, 09:21 AM   #12
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Ummm, I wouldn't make a habit of ignoring what Andy says. Imagine being on trial for involuntary manslaughter for a highway accident that you caused and your defense is "I did the opposite of what one of the nations top experts on Airstreams said to do. I don't understand what went wrong."
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Old 02-27-2013, 07:16 PM   #13
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Ummm, I wouldn't make a habit of ignoring what Andy says. Imagine being on trial for involuntary manslaughter for a highway accident that you caused and your defense is "I did the opposite of what one of the nations top experts on Airstreams said to do. I don't understand what went wrong."
If there was an accident with the person being at fault it would be a rare to have a civil trial. Most insurance companies just write a check. A criminal trail is unheard of. And bad attorney's advise be to put the person cited for at fault on the stand. That almost never happens.

With that said, Nations top expert rating is one I have not seen.

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Old 02-27-2013, 07:24 PM   #14
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I had Carlisles. Mine failed randomly in rather catastrophic fashion even though I am downright anal about tire maintenance. Never again.

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