i for certain can tell you that i have to slow down, not by choice, but do to weather conditions(snow, ice, slush), and you then have the delicate balance of your air pressure in your tires, do you let you bike sit out side and acclimate to the cold and then top your tires off, or does if go straight from inside you house to the road? that can be a big difference in the tires, specially lower pressure tires.