i carry two tubes, levers, alien tool, a patch kit that i rarely use, a couple of cans of air and a lightweight frame pump.

i'll use the CO2 first, jsut cuz its faster, but i like having a pump cuz i've been stranded without air before and i bought the frame pump THAT DAY, after a nice roadie stopped and let me use his frame pump so i could getto work sorta on time.

so yea now i rock both. the extra couple of oz is negligible at the end of the day, and the peace of mind that i can make it home under my own power under almost any circumstances is comforting. also its nice to be able to offer to help a stranded rider without then having to prey you dont flat out on the way home.