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Old 10-11-2010, 03:32 PM   #1
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1976 Argosy 28
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Question ST205/90D15 and 7.00x15 same axle????

I have read and searched many post but have not answered my question (I know it's probably out there some where, thank you for your tolerance)
I have a 1976 28' Argosy tandem axle and have 2.5 year old Power King 7.00x15LT tires. I have to replace one of them. My local guy got me a Carlisle ST205/90D15 (he had previously gotten me the Power Kings). On the tire it says "replaces 7.00x15LT" is it okay to put this tire on the front right wheel location??? Is there a need to replace the front left with exactly the same tire? The diameter certainly is very close when I measure. I plan to trailer from Vermont to Texas and back before Thanksgiving. Thanks you for your help.
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Old 10-11-2010, 03:41 PM   #2
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Quote:
Originally Posted by quip000 View Post
I have read and searched many post but have not answered my question (I know it's probably out there some where, thank you for your tolerance)
I have a 1976 28' Argosy tandem axle and have 2.5 year old Power King 7.00x15LT tires. I have to replace one of them. My local guy got me a Carlisle ST205/90D15 (he had previously gotten me the Power Kings). On the tire it says "replaces 7.00x15LT" is it okay to put this tire on the front right wheel location??? Is there a need to replace the front left with exactly the same tire? The diameter certainly is very close when I measure. I plan to trailer from Vermont to Texas and back before Thanksgiving. Thanks you for your help.
Torsion axles operate very differently from spring suspended axles.

All 4 tires must be the same.

If not, you can cause one or more of the following.

1. Sway due to improper weight loading.

2. Excessive wear on the overloaded tire/tires.

3. Ruin the rubber rods in one side or both side of an axle, due to carrying more weight than designed.

Andy
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Old 10-12-2010, 01:30 PM   #3
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Andy is on the right track. The tire construction is different, so wear will probably be different. Also...if the diameter of the tire is different, this will affect tire wear as well.

Best to stick with a consistent tire all the way around...especially on a long road trip (VT to TX).

Hope this helps!
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Old 10-12-2010, 04:31 PM   #4
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I would be leery of mixing tires, metric and standard sizes and possible construction differences. Diameter is important even though the same size tires from the same manufacturer sometimes have slight diameter differences. However if you combine tires with different construction and different diameters it could be a problem.

My other concern is why only one of the tires needs replacement and the others are in good shape. For instance if it needed to be replaced because of an abnormal wear pattern instead of failure due to a road hazard it could signify that you have a problem with the axle or a bad wheel. Replacing it with a tire different than the other three could exacerbate that situation.
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Old 10-13-2010, 04:09 PM   #5
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Thank you to everyone. I will always avoid potential problems, so it's all new tires for us.
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