If you ever find yourself in position without a pump with a presta end or an adapter find a department store pump and unscrew the valve at the end and insert the presta valve into the end of the hose. I have done this twice and it worked great. I was able to get my tire to the 80 psi of 85 it called for.


The presta valve pits perfectly into the diameter of the hose. I have seen it used on two different pumps. Of course not all hoses will be the same size inside.