D
David Miles
Guest
I have a Zefal track pump, and want to pump tyres with presta valves. The basic outlet on the pump
is for Schrader type valves but it came with an adapter which fitted into the Schrader outlet, and
had a rubber insert within it which sealed onto the Presta thread. Unfortunately the rubber has worn
over the years and needs replacing. But all the bike shops I try now offer me a small brass adapter
which just screws onto the Presta thread, with the other end going into the Schrader outlet of the
pump. There is no rubber and the seal between the bare threads is poor so that I seem to let out
more air than I put in!
Does anyone know a source of a better adapter? Since I need two hands to work the pump, I would
ideally like something which doesn't need another person to hold it on the valve while pumping.
Surely this is not an uncommon requirement,, but the bike shops don't seem to have ideas.
is for Schrader type valves but it came with an adapter which fitted into the Schrader outlet, and
had a rubber insert within it which sealed onto the Presta thread. Unfortunately the rubber has worn
over the years and needs replacing. But all the bike shops I try now offer me a small brass adapter
which just screws onto the Presta thread, with the other end going into the Schrader outlet of the
pump. There is no rubber and the seal between the bare threads is poor so that I seem to let out
more air than I put in!
Does anyone know a source of a better adapter? Since I need two hands to work the pump, I would
ideally like something which doesn't need another person to hold it on the valve while pumping.
Surely this is not an uncommon requirement,, but the bike shops don't seem to have ideas.