Originally Posted by
waterrockets
495 ci? That's big enough for a pair of sandals and some patches
My commute pack is a 40L (~2400 ci) back-country skiing pack. Nice pockets everywhere, and compression straps to fit it nicely to the cargo so nothing is bouncing around. Most of the time, it's really flat to my back, but I've got room if I have to run an errand on the way home (I pick up my wife's foot race packets often, or groceries).
ya my jansport odyssey is 2350ci, so about your size and i love it, but sometimes i feel like it could ride with less so i use a smaller oakley bag that my friend gave me (it was free so why not). I run a lot of errands with my bike too, i live in mission viejo so it's pretty quiet so i ride to the local blockbuster near my LBS, stop by and say hi to everyone, ride to starbucks, friends, groceries, etc.
I just went carless this summer and so far all has gone well, not too many jackass motorists yet (>_<)x
I also feel better than i have ever felt physically.