New tires/rims on my 72 boler - Page 2 - Fiberglass RV


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Old 01-24-2013, 04:37 PM   #15
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Name: Slavomir
Trailer: 1978 Boler
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We're restoring a 1978 Boler and are installing Carlisle ST175/80R13C1 tires from Discount Tire on new 13" rims. We did get a new axle also.
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Old 01-24-2013, 09:45 PM   #16
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Originally Posted by slavandheather View Post
We're restoring a 1978 Boler and are installing Carlisle ST175/80R13C1 tires from Discount Tire...
"ST175/80R13C1" isn't a valid tire designation - it's Discount Tire's corruption of "ST175/80R13", presumably for the Load Range C version of what is likely a Carlisle Radial Trail RH. It's no big deal, but if someone goes asking for "ST175/80R13C1" at a competent tire retailer, it will just cause confusion.
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Old 01-24-2013, 09:59 PM   #17
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Quote:
Originally Posted by Brian B-P View Post
"ST175/80R13C1" isn't a valid tire designation - it's Discount Tire's corruption of "ST175/80R13", presumably for the Load Range C version of what is likely a Carlisle Radial Trail RH. It's no big deal, but if someone goes asking for "ST175/80R13C1" at a competent tire retailer, it will just cause confusion.
This is incorrect.

"C1" is a designation in a new tire rating system initiated in Europe. It has to do with an individual tire's rolling resistance, perhaps the most important fuel-economy related feature of a trailer tire.

Carlyisle is to be congratulated for putting that information on its tires, and let's hope that other..."competent"?...tire makers will soon follow suit.

Francesca
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Old 01-25-2013, 12:45 AM   #18
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Originally Posted by Francesca Knowles View Post
This is incorrect.

"C1" is a designation in a new tire rating system initiated in Europe. It has to do with an individual tire's rolling resistance, perhaps the most important fuel-economy related feature of a trailer tire.

Carlyisle is to be congratulated for putting that information on its tires...
Sure, if that's true I'll happily withdraw my comment.

It's fascinating that Carlisle doesn't mention this in their own site; do they show it on the EU-defined label? It's also very interesting that a company which manufactures in Asia and North America to U.S. standards (ST from TRA) would identify those ST tires with a Euro standard. More interesting, according to the Hankook link "C1" is a vehicle class, not a tire class; even more interesting, C1 is for passenger cars (a strange choice for an ST tire). Even better, the Discount Tire site ends other sizes of the Radial Trail RH in "D1" and "E1" - since the other vehicle classes in the EU system are "C2" and "C3", what do these other letters mean? Could it be that each capacity of tire is for a different class of vehicle (cars, light trucks, heavy trucks), or are those letters really the load range, as I suggested?

Again according to Hankook link, the performance ratings in the EU system would be a letter from A though G for fuel efficiency, a letter from A though G for wet grip, and noise rating of "Wave 1", Wave 2", or "Wave 3". Where are those performance class values for this Carlisle trailer tire, in either the Discount Tire website or any Carlisle material? I couldn't find any mention of the EU scheme or the corresponding ratings for any tire anywhere in the Carlisle website or their 97-page downloadable full 2012 catalog. Okay, I know, stop teasing... we all know they're not there because Carlisle isn't supporting the EU labelling system for their trailer tires, and Discount Tire just has a website glitch, which was the point of my first (short, clear, useful) post.

The Hankook page is good; a more authoritative source is the EU Tyre Labelling page. It explains that the ratings are provided on stickers, labels, and technical promotional material at the retail location. The Hankook site has a nice tool for displaying the information, once you find it (there's an icon near the left side of each tire product page).

Aside from any possible application of this EU labeling standard to Carlisle's tires, it is good to know about. It looks like the Uniform Tire Quality Grading system in the U.S. (also used here in Canada). That one isn't applied to ST tires, either.

Quote:
Originally Posted by Francesca Knowles View Post
... let's hope that other..."competent"?...tire makers will soon follow suit.
Since Discount Tire is the same company which mis-reported the "R" for "radial" as a speed rating on many trailer tires (as confirmed by e-mail from the Consumer Affairs department of Discount Tire / Americas Tire), they - and specifically their website - have no credibility to me. My reference to competence was clearly related to retailers (e.g. Discount Tire), not manufacturers (e.g. Carlisle). Although I have no desire to buy Carlisle tires, I make no judgement of their competence nor did I intend to suggest any such judgement.

Any moderator or administrator who deems that this part of the discussion is an annoying diversion is encouraged to move or delete this post along with the misleading post to which it is responding with this author's thanks.
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Old 01-25-2013, 09:18 AM   #19
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Sure, if that's true I'll happily withdraw my comment.

Sure took a lot of bandwidth to do so, but I'll take your word your withdrawal was in there somewhere.

Francesca
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Old 01-25-2013, 09:36 AM   #20
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Originally Posted by Francesca Knowles View Post
Sure took a lot of bandwidth to do so, but I'll take your word your withdrawal was in there somewhere.
No, it wasn't.

Once more, with more clarity, for those having trouble reading:
The "C1" on the end of tire designations in Discount Tire's defective website is not a reference to the European Union's new tire rating system. It is just the load range, incorrectly presented.
Any moderator or administrator who deems that this part of the discussion is an annoying diversion is still encouraged to move or delete this post along with the misleading posts to which it is responding (up to a string of 4 posts now) with this author's thanks.
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