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Old 09-20-2008, 05:47 PM   #1
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7.00-15....what would you replace them with?

Im finding several options...not sure if i should go with 70 or 75 series...opinions??
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Old 09-20-2008, 07:07 PM   #2
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Options, if you want to go with comparable size and capacity, are:
7.00X15LT
7.00R15LT
ST225/75R15
70 series tires are not recommended for trailer use.
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Old 09-20-2008, 07:11 PM   #3
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Hi

What year model and size trailer are you putting them on?

Thanks

Andy
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Old 09-20-2008, 07:19 PM   #4
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The old numeric designation for tire sizes were somewhat equivilant to 80 series tires. When I changed out the 7.00-15 bias belted tires on the GT to the "recommended" 225/75 R 15 the coach dropped about an inch in height. Some of this is due to the greater flex in a radial sidewall.
Practically speaking there is more dampening of road shock the higher the sidewall. I don't know if this is a consideration in your choice of tire sizes or if there is some other circumstance you're thinking of.
There are numerous threads on tires here, so hit the search button for more opinions than you can digest in a single sitting.

Tom.
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Old 09-20-2008, 08:57 PM   #5
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Im putting them on my newly purchased '71 Sovereign...The ones on there are cracked to bad to take the 250miles...
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Old 09-20-2008, 09:07 PM   #6
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Quote:
Originally Posted by aircooled4 View Post
Im putting them on my newly purchased '71 Sovereign...The ones on there are cracked to bad to take the 250miles...
We have ST225/75R15 load range D tires on our Sovereign.
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Old 09-20-2008, 10:20 PM   #7
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We have ST225/75R15 load range D tires on our Sovereign.
That's what we just put on our Overlander as well.

Jim
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Old 09-20-2008, 10:31 PM   #8
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One thing i forgot to ask...What bolt pattern is on this? Would wheels from any particular make of pickup work?
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Old 09-20-2008, 10:56 PM   #9
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I put on the 225x75R 15 also as well as new axles and noticed that I can make a trip with everything inside staying put. I even left the soap dispenser on the counter and it was still there after 30 miles.
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Old 09-21-2008, 07:06 AM   #10
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One thing i forgot to ask...What bolt pattern is on this? Would wheels from any particular make of pickup work?
They are 6X5 1/2", zero offset. They need to have a weight capacity of 2500 pounds each. This is because of the side flexing that takes place when you turn your trailer.
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Old 09-21-2008, 07:10 AM   #11
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Since 1971 we had almost always used 7.00R x 15" radials on Airstreams which work very well. They are getting harder to find and so a few years ago we started experimenting with alternatives.

The the various trailer tires are ok but they do not hold their ballance well and often suffer from shifted belts.

We have had good luck with several brands or 235/75*15"LT Load Range "C" tires.

The other alternative is a Michelin P235/75R x 15" tires. These tires can carry the Airstream with only 35/41 PSI of pressure. On a vintage unit these take a great deal of road shock out the unit. The downside is that they have a little more sidewall sway.

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Old 09-23-2008, 06:52 AM   #12
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Tirerack.com has a tire made by Yokahama, 7RX15, which is the new radial designation of the 700X15 size, and I'm considering trying a set. The only thing is the overall diameter is a little larger than the 225's, but several people on here have stated they have changed to 16's, so it shouldn't be a problem.

Yokohama RY215

One of the reviewers made this statement: 7.00 x 15 is a size I needed for my 8,000-lb all aluminum travel trailer. Put some miles on the existing bias ply tires but they looked poorly and were running hot. Tried another tire --radial -- but was displeased with them. The previous owner had one of these in the trunk as a spare with most of the tread worn down, told me that he had kept the best one. It's appearance was good, so I decided to tray a full set of four. Had the trailer axles re-aligned, installed [4] new shocks and had the alloy wheel/tire combination balanced on a Hunter GSP-9700 and the weight necessary was low (!!). Was pleased with how fast Tire Rack got them to us.On Texas days of above 100F the tires were all within 5F of each other after exiting Interstate; they ride very well. In sharp turn and u-turns they do not deflect as badly as the tires I replaced, really not that much. They are not loosing any air, etc.I was told these are tires for commercial service and delivery vehicles, they are certainly heavy for their size and apparent construction. I would recommend them for someone needing a trailer tire of this size and in this load rating. I am looking forward to long life with mine.
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Old 09-30-2008, 05:28 PM   #13
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Quote:
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The other alternative is a Michelin P235/75R x 15" tires. These tires can carry the Airstream with only 35/41 PSI of pressure. On a vintage unit these take a great deal of road shock out the unit. The downside is that they have a little more sidewall sway.

Andrew T
We have been using a set of the P235/75r x 15's XL (with the extra load option) for 6 years now. They really work well with our 35 year old Airstream. The 32 to 35lb pressure allows them to have a large road contact patch and they handle road irregularities with ease. The load rating is 8,500lbs for the 4 and our road ready Airstream is only 4,500lbs so lots of headroom in the capacity department.

Quality P rated tires also seem to have a better reliability record compared to ST tires.
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Old 01-16-2017, 08:39 PM   #14
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Trailer tires

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Originally Posted by Jim & Susan View Post
That's what we just put on our Overlander as well.

Jim

When you put the 225 75. r15 tires on your overlander did you notice the trailer dropping down lower. I have heard they are not as tall as the 7.00. 15. We are so low now that we sometimes drag pulling into unlevel sites.
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