While I don't encourage riding under such conditions, I have learned a great deal about the capabilities of my bike and its tires while caught in downpour conditions. It's amazing what a bike can do in the rain. If you're careful, watch out for puddles, and avoid rain tracks in the lane, and prepare more for braking, it can actaully be fun. More importantly, it builds confidence. It's all part of riding.
Liquid sunshine brings out the best and worst of all riders.
Know Your Limits Don't plan on 500 mile days, if you haven't ridden in a month. On long trips, statistics show that on day seven, the typical long distance rider will cover about 65 percent of the average daily mileage on a two-day trip. This means fatigue is progressive over days throughout a multiple day trek. Plan ahead for this fact. There's nothing worse than rushing a trip and getting to see nothing but yellow lines flash by next to you.