I don't plan on riding in the rain and I would rather not, but of course it happens. I make no special preparation for it, I just get wet and don't worry about it. The only thing I feel bad about it the machinery because the water can be bad for bearings, chains etc.. So it is extra cost in money and time to keep the bike going. Unless the weather in someone's area gives them no choice, or they are on a ride over a number of days longer than the weather can be predicted, then their choice should be to ride an indoor trainer when it is wet outside.