So I've my sights set on a 300k brevet this August. I have a good plan for training and have read a lot of the websites (RUSA, ultracycling etc) for info. I'm most worried about my bike ... most of what I read tells me that a racing bike is wrong for these types of events, but that's what I have to work with. Any suggestions for how I might make some simple modifications to survive 300k? Also, because I'm curious, for those of you who ride brevets, what bike do you use?