this is a continuation of the 'junk miles' discussion. i think we can all agree that accrued milage spent coasting is junk miles.
is it 5% to 10% of your time in the saddle (including slowing for traffic lights, downhilling, etc.)?
How about during a century?!
so during a 3000 mile year, 5% would mean 150 miles of coasting?!