I recently purchased a bike with zip 808 firecrest hooked wheels and need tubes. Continental only makes up to an 80 mm valve length but I can’t even find any that would work with 32mm GP5000s so I went the valve extender route. I tried both continental and fouriers valve extender. I attempt to pump them up with my Park Tool pump and it’s a no go it just blows air out and in but does not seal. The hand pump that I carry with me in case of a flat works though but that is painfully slow and no idea on PSI. Idk just frustrated that I can’t even figure out how to pump up my tires. Sigh. Any advice is appreciated it. I could go tubeless I guess but not ready for that learning curve. Any guidance is appreciated.
by hboardz133
1 Comment
Have you tried a different floor pump?
Try wrapping teflon tape around the valve before utting the extender. It’s going to be a tight fit but it might just seal it up just enough.