| Re: Potential good news for Mt. Washington access.
Mike Kruger wrote:
> 1. Wouldn't mountain bike tires take more heat, just because
> of their greater mass and volume?
Rim mass and area makes more difference in dissipating heat than rubber and air
(which are not good conductors). However, most mountain bike rims are not too
different from road bike rims in this respect. The important factors are a
mountain bike tire's lower pressure, and maybe a fatter, more robust bead hook.
> 2. On a mountain bike on a fire road, wouldn't one still be
> going more slowly than on a road bike on a paved road?
The potential energy to be dissipated is the same either way. Though it's
counterintuitive, higher speeds actually produce lower rim temperatures, because
of increased airflow. The hottest my rims ever got was creeping down very steep
(>20%) grades.
Matt O.
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