The pump I bought was suppose to work on both type valves. However, I made the mistake of using my pump on my shraeder valve Sedona and messed it up and couldn't use it for my road bike. After using it, it would no longer work on my road bike presta valve. I took it to the bike shop and he said it was messed up from using it on the shraeder valve...funny, they told me it would work on BOTH when I bought it.
Anyway, I just use a seperate pump for the comfort bike instead of using the same pump for my road bike. They told me it would work for both but obviously it didn't.



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