Are there any that actually work? I've had a Topeak one for years and its hopelesss, just like the one it replaced. Has technology reached the stage where these things actually do the job they claim to do? Is there some knack to using them that I haven't worked out?
I'd like one that can get a 25mm tyre up to about 50 psi reasonably quickly.
I'd like one that can get a 25mm tyre up to about 50 psi reasonably quickly.