It's rain that gets me off the bike and into the car. Just wish my glasses had windshield wipers; I don't mind getting a bit wet but I hate it when I can't see through the rain streaked glasses and of course can't see without them. Drivers seem less attentive, too.

And I don't bike to the grocery store if I'm going to be hauling a heavy load into a headwind up that hill on the way home.