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Old 07-07-2002, 08:57 PM   #46
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A shore rating is a durometer rating - there are several ranges, however, and you have to make sure you are using shore 0 (???) because they all differ, they go from 00, 0, A, B, C, D (being the hardest - usually used for things like bowling balls. . .)

So, when we say we are using 42 shore and 37shore, those are durometer readings at 0 (and technically should be called 42 shore 0, but, nah, who cares )
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Old 07-08-2002, 11:19 AM   #47
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Thanks Boomer:

But now I have another question.

How do you know which shore (00, 0, A, B, C, D) is being used with a durometer?

One of the reasons I ask is that TRC use to put durometer readings on there packages and If I'm not mistaken, it seems that those readings were always about 5 points lower than what people would compare an equal tire to using a shore rating.


And to make matters worse. Trinity has started making there front and rear tires the same shore rating but one (can't remember whether it was the front or rear) has more rubber on it so they will wear faster.

Not to mention that widths front to rear are now different.


Sorry if this has been covered previously but I am just trying to under all of this.
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Old 07-08-2002, 05:05 PM   #48
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Usual rating (for our tires) is 0 - believe it or not, the rating that Jaco, at least, purchases their foam with is C - same foam, different rating system. . .

Anyway all of our tires are rated with 0. TRC may be just a bit softer because they use a different rubber supplier.

Hardness (durometer, shore) is only one factor - sidewall is also something to consider, yes. The taller the sidewall, the more the tire will flex, leading to more wear. I like some old rims that I have (don't know where I got them) that are huge so that at a regular tire size I don't have much sidewall - takes a bit of bite away but cuts way down on wear.

Anyway, our tires are pretty much universally rated with the 0 scale.
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