On 12/11/2013 01:51 PM, NickBull wrote:
Because what happens on the DC area bike paths (none of which are plowed to my knowledge) is that during the day, the snow partially melts, people ride on it sliding all over and leave ruts that veer every which way (not to mention all the walkers with their footprints). Then overnight everything refreezes and those ruts are like little icy Grand Canyons. If your tires don't have enough studs sticking out to the sides to catch on the sidewalls of the ruts then they won't be able to climb out of the rut. So then the tire has no choice but to slide sideways down the rut while meanwhile your momentum continues forward, making it hard to avoid going down.
Excellent description, lacking only one point: after the first couple of days, the snow on the trails melts entirely in many places, leaving only splotches of rutted ice except for areas always in shade or at bridges & overpasses. In those areas -- for example, on the Mount Vernon trail headed into DC, you can expect to find ice on the two overpasses at National Airport and under the bridges crossing the Potomac into the District -- the rutted ice can sometimes linger for a week or two. Those areas all together may add up to one, or perhaps two tenths of a mile on an 8 mile trip from Alexandria into the District.
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