Originally Posted by tvJefe

The pump is nice to add a little air into your tube to give it shape and get it on the rim. But really it's your safety net (just like the pre-glued patches). CO2 can fail, but your pump will be able to get you home.

Just last Saturday I had a double flat 15 miles from home. Changed both tubes and rode home without further incident. But if I DID get another flat, I would have needed to use a patch and the pump to avoid a call of shame to the wife.

I'm not in a race. I don't need to worry about a few extra grams on the bike. I seldom do rides under 60-70 miles, and that can put me WAY out of walking distance home. Feeling like you have the tools to get yourself home is worth another lb, in my opinion.