Originally Posted by TiHabanero

I have been commuting on 28mm tires for decades. Never an issue with flats or durability. I also have a Miyata 1000 with 38mm tires on it that I use for commuting once in a while. The fit of the two bikes is near identical. The rack, bags, lights, pedals, and drive train are identical. The different tire size makes a slight difference in the commute time. 15 miles one way takes about 10 minutes longer on the wider tire bike. Mostly I feel the difference climbing out of the river valley, and the other hills on the route. Comes down to acceleration. When the wheels have to be pushed the narrow tires do it better. I will say, the 38mm tires have never had a flat, whereas the 28mm have had two flats in the last 4000 miles. 28mm tires are the low end Conti Ultra Sport tires, the 38mm tires are Conti City Ride tires.