Thanks for your reply

I agree with you with the adding weight onto the bike by clipping the pump on is probably not the best. Plus it will get in the way and could fly off and cause problems if I hit a big enough bump or something lol who knows what could happen out there. I guess the hand pumps are good to have at home to top up the tyres before a ride.

What brand CO2 cartridge do you use? Would you recommend it? $23 sounds quite reasonable. If you have the cartridge sitting there for a long time, say a year, does it effect it? I bought a saddle bag the other day so I could get a cartridge to put in there. I hadn't really thought of that.

It says to inflate to between 100 and 145psi. Also, my tyres say 700x23c. Is there much difference between that and 700x23? What does the c stand for? I bought some tubes the other day for 700x23 because I didn't see the c. Will this be a problem?