Hi MikeSwift,
Did you have winter tires on it?
With my Nokian Hakkapelita 7 studded, I obtain exactly HALF of what I have in summer in autonomy, so the tires plays a big role in autonomy as much as cold temperatures.
From what I see your results are almost the same as mine, I bet the cold temperature is really impacting your results, but have a good look on tire pressure before each ride, in cold temperature it can vary a lot and in my case it explained a lot of bad results, using nitrogen will greatly help stabilizing tire pressures.
|