First aid. don`t carry much, for road rash, just walk it off. If it is really bad,you need an emergency.

I would look at an ultrralight backpacking site for a gear list. You should be ble to get all non-bike, non-food gear weight down to under 10 pounds. I don`t stick to those lists, but they are a good starting point:
http://www.rayjardine.com/adventures...nsAm/index.htm

Road morph an quick stick for tire repair.