My mileage seems to average out over the course of the year. Right now, I'm riding the Trek MTB with studs, but that will change in a couple of months, when the Jamis Commuter 3.0 gets used full time. During the warmer months, the Raleigh road bike goes for longer rides on weekends. I store the Dahon folder in our camper to ride around the campground. They all get used, they just take time off at different times of the year!