Wow, I had to reread this a couple of times.... Biking is one things I enjoy and can do. Even with my CHF (congestive heart failure) and an EF = 15% (Ejection Fraction amount of blood pumped out of your heart in one beat). So please don't assume all those that carry a CO2 pump as lazy. There is no way I can use a hand pump to get 100 psi in my tires on the road. I'm pretty well done with changing the tire during a normal ride of 25 miles or so. I do have tire liners and a good home floor pump. But, with the thorns we have on FL trails I'll take an CO2 type pump with me. AND I plan on riding as long as I can.