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Old 03-04-2011, 04:24 PM   #1
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Does anyone know how to convert tire sizes?

On this old camper trailer frame I have it has four Bridgestone Skyway II tires. It has lettering as follows:

DOT EHH2 BAD206

700X14 Obviously the tire size.

Also SKHXD molded in.

I have found a spare rim for it (still need another) and I would like to get a new spare of the same diameter or very close to it but I don't know how to convert the 700x14 to a new metric size and get the same diameter.

These tires are so old they are made in Japan. They are weather cracked but tread is amost new so I am gonna run them till they drop and will be relacing them with new tires.

If anyone can help translate the above please advise. Many thanks.
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Old 03-04-2011, 04:39 PM   #2
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Humpy

If they are weather cracked as you say, you might want to replace them before using them. Else there might be nothing left to put new tires on.

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Old 03-04-2011, 06:40 PM   #3
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Yeah that is for sure. That is why I want to replace the spare with something the same size or slightly larger and as they go down I will replace them. This is primarily going to be a local haul trailer used once or twice a year and limited to about a 50 mile radius.

It is funny about tires though. If it has the right ozone treatment it will last many years regardless of the cracking. I had some Jeep tires on my military trailer dtd 1952 and they just kept running and running.

I took a course on Material Deterrioration Prevention at Rock Island Arsenal and it was amazing what they taught us about tires and the difference between military tires and civilian tires. Military tires a designed to go on hard stands and remain unmoved for many years in depots where passenger car tires are not. The difference is just a few cents of an additive per tire to make them last many years.

I changed them out to 15" radials and the trailer moved so much easier just pushing it around the yard.
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Old 03-04-2011, 06:44 PM   #4
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So when the tires blow and tear out the side of the trailer you will replace the tires and repair what's left of the trailer.You might want to reconsider.
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Old 03-04-2011, 06:49 PM   #5
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go to a tire store, they can help you out....
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Old 03-04-2011, 06:58 PM   #6
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I can not vouch for the accuracy of the site but the size conversion is listed at this link
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Old 03-04-2011, 08:10 PM   #7
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There is no body on the trailer. Only the frame. I go it to deck it out so I could haul long stuff like bar joists so if tire blows no biggie. It has a 21' box. I got it all wired and full set of brake, turn, tail and clearance lights and reflective tape as well.
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Old 03-04-2011, 10:05 PM   #8
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The DOT number is the Department of Transportation's designator it tells in code where and when the tire was manufactured, it looks like this tire was made the 2nd week of 2006. The size 700 x 14 would be a 7" wide tire for a 14" rim any tire shop should be able to get you setup.
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Old 03-05-2011, 12:13 AM   #9
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The 205/70x14 mentioned in the link above comes in a "ST" both in radial and bias belted which are intended for trailer use.
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Old 03-05-2011, 06:12 AM   #10
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John RR, I think you are right on that. On the date on the tires these are narrow tread bias belted tires and if I am remembering correctly I haven't seen these type tires sold in about 20 years. Here are the pics.





I called Dexter and these rims went out of production in 1980 (gee ain't I lucky ! ! ! !) so these could be the 70s????

I am figuring now from what I am seeing 195X75RX14 is what will come close to this size wise. Eventually all four tires will have to be replaced.

The above rims came in 13", 14" and 15". One thing for sure if I get new ones I will fabricate covers for them so the sun won't kill them.

Funny I have a military cargo trailer designed for pulling behind a tractor in train fashion (front axle steers) and I have had it over 10 years sitting outside and the tires are not cracked at all as they have the additive. I suspect this trailer was made in the 80s.

It is for sure the companies don't want to add 20 cents a tire to put in the additive to make them last as mulitplied over millions of tires cuts into their profits.

One of the sites I read says the ten year date code was designated because they figure tires won't last over ten years and it is for sure they don't want them to.
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Old 03-06-2011, 06:36 AM   #11
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Just saw another thread on tires and THE BERRYS recommended Tire size calculator which is a Miata Tire Size Calculator. Exactly what I was looking for.
That is a nice thing about these forums. You put out a question and sooner or later somebody is going to know the exact answer to about any question that comes up.

I have that calculator on my Favorites and will see lots of use.
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