My Harley is belt drive. They say the belt will last 100,000 miles, need little maintainence etc. I broke mine in 18,000 miles. A close inspection revealed I had picked up a small sharp rock in the rear pully that acted like a knife against the underside of the belt. The belt works good on a motorcycle, smooth and quiet. I'm sure it would be the same on a bicycle. I will however, never buy another belt drive motorcycle (or bicycle for that matter). A chain can be fixed on the side of the road with simple tools if it breaks. When a belt breaks, you need a new belt. I would check the cost of replacements too. It was almost $200 for my motorcycle belt.