Most frame pumps will not get to 120 psi, but C02 cartridges will. In other words, the frame pump is just for emergencies, and you'll need an additional floor pump to get to 120 psi when you get home. There are a few frame pumps that will get you to 120 psi (like the road morph) but they aren't small and weigh a lot more than a couple CO2 catridges.
- Warren