Cool review on the trials tire. What happens when you hit the inevitable California Sand Wash? Some of the riding I like has some dust over hard pack climbs. I have a YZ250 2stroke, and I find I just come into the hill with more speed and keep the momentum up to reduce wheel spin... which means I am constantly catching my friends on the 4-strokes which creates dramatic passing opportunities.
Anyhow, I see them (mostly the KTM guys!) around here in Nor Cal and have always been curious!! I need an 18" wheel, first. =) (rim and spokes would be good, too!)
Trials tire in sand... pretend its hard pack and just ride. No big deal.
Fast riders carrying lots of speed and momentum really don't need a trials tire. Its for us slow guys ...