Jeff Liebermann wrote:
> On Tue, 22 Jul 2014 09:23:14 -0700, Joerg <inv...@invalid.invalid>
> wrote:
>
> (...)
> I don't have an answer to your questions, but do have a suggestion.
> Get a durometer tester:
> <
http://www.ebay.com/itm/141250852613>
> Rule-o-thumb. 70 is hard, 60 is typical, 50 is soft.
>
Most modern tires are dual compound. Hard longer-lasting rubber in the
center, soft on the sides for when you hit the trail. However, my
definition of longer-lasting is entirely different from that of the
bicycle industry.
> I have one that I've been using to measure the hardness of various
> rubber bicycle components (and encapsulation compounds). I find that
> the harder rubbers tend to last longer, while the really soft rubbers,
> that give the most comfortable rides, wear quickly. Some tires have
> different durometer readings on different parts of the tread. The
> reading will also vary with temperature. If you spin the tires in the
> dirt or skid to a halt, the tire will get hot and soften. My guess
> (not verified) is that the more rubber in contact with the road, the
> longer it will last.
>
My rear wheel rarely spins and I don't drag it through turns like
competition MTB riders. But I do cycle at a pretty fast clip on trails a
lot, 15mph or more through the rough stuff, mostly to get from A to B in
a reasonable time.
> More:
> <
http://mountainbikefaq.com/2010/02/mountain-bike-tire-compound>
>
Not much new info in there, I know that you can't have it all. That's
why I have a priority list and am willing to sacrifice traction for
better durability. What I find disappointing is that bicycle tires are
orders of magnitudes from the tread wear quality of SUV tires yet cost
almost as much or sometimes more.
My MTB isn't only used for fun but also for transport. Though I have to
confess that I occasionally take a detour via a nice trail. This is why
the bike spends most of its time on dirt, riding on asphalt is so boring.
If there isn't any tire with substantially less wear I'll just go the
route of finding the lowest cost tire that does the job and then use
them up one by one. Environmentally that is not a good way of doing
things but what can ya do?