Hello! I have more dumb things to say.

A couple months back I bought a cheap frame pump for my commute. It sucked. It tended to bend my Presta valve stems and didn't do well with getting PSI over about 60 or 70 on my 700x23's. Don't think I ever tried my 700x 28's with Schraeder, but if I did it wasn't a positive experience. Thinking it was the pump, I traded it in for another cheap frame pump. Also crappy experiences. The worst bit seemed to come when taking it off, as I was never able to smoothly detach it and ended up spilling air. Don't have that anymore either.

Recently I got a floor pump worth having (a Topeak). It is GLORIOUS, though not quite as smooth as the Blackburn AirTower 4 we have here at work. It replaced a crummy foot pump I bought ages ago, which sucked so hard I giggled with glee when it finally broke.

So now I want a good frame pump, to replace or supplement the CO2 *** I carry in my commuter bag with a spare tube. I'm aware Topeak makes good pumps, so I'm liable to get their frame pump, which has been thumb-upped here a couple times I've seen. However, I'm not sure just how to benchmark it as a good pump. Here are my questions (after much wasted text above):

1) How much pressure are frame pumps, in general, "good for"? They lack a strong base to push against, so I suspect they might not be able to get the 100-120 pounds my tyres ask for.

2) Are they typically brutal on Presta valves, specifically the stems? Is there a technique to it, or is it a problem with cheap pumps (a concept I am wholly abandoning)?

3) When detaching, do these usually have issues causing leaks? Or is that another technique and or cheap pump thing?

Thanks,

M.