My husband can fix a flat in a few minutes. Me? Well, it depends on the front or back, first of all. I did my front tire in about 5 to 7 minutes in my garage with my regular tire pump. The back tire takes a bit longer and I've done it out on the road more than once, but had a friend to help. I also had a C02 cartridge, which puts air in lickidy split quick. I'd say 10 minutes to do the back wheel out on the road, assuming there are no strange circumstances that make it take longer.