I have a 2013 Surly Pug. Night I picked it up it was early December but still fall weather here, had been sunny and close to 60 that day, after dark fell into the 30s. Decided to take it out, thought I would go 20 miles - wrong, on dry pavement the rolling resistance of the tread is high. Tough ride.

Whole 'nother beast in fresh snow - ride smooths right out, almost glides in the right snow conditions. Truly a fun ride indeed - but still a pretty good workout.