You really need to look at the cost-per-mile. A Grand Bois Hetre lasts 
5000+ miles for most riders. So the cost per mile is much lower than for 
most tires. The Compass Babyshoe Pass, Loup Loup Pass (650B) and Barlow 
Pass (700C) have almost as much tread in the center, so it will last 
roughly as long. (We removed tread on the shoulders of the tire, where it 
doesn't wear, to make the tires lighter.)

Of course, a Marathon or something super-beefy will give you even lower 
cost-per-mile, but if you can get a more enjoyable, fun ride for an extra 
1-2 cents per mile, I consider that worth the cost.

With some "event" tires that are even lighter, your cost-per-mile will go 
up a lot, because you cannot use the last millimeter of tread. In fact, 
some of the super-superlight tires are so thin that I'd consider them close 
to the wear limit right out of the package. I wrote about the compromises 
inherent in making tires here 
<http://janheine.wordpress.com/2014/04/23/the-art-of-compromise/>.

Jan Heine
Compass Bicycles Ltd.
www.compasscycle.com

Follow our blog at http://janheine.wordpress.com/

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