I bought a new bike and am having my first experience with Presta valves. I have a perfectly working floor pump with one exception - the dial of the pressure gauge was broken long ago. The pump has a fitting that is marked to fit both Schrader and Presta valves so I guess I can top off the tires.
But how do I measure the pressure? My pencil gauges that I use on Schrader valves don't look like they will work on Presta valves. Right or not? (I do have a Presta-to-Schrader adapter).
I am hoping not to have to buy a new pump with a working gauge. The good ones look like they cost $60 or more.
Is there a cheap gauge that works on Presta valves?
If it makes a difference, this is a flat bar fitness bike that the shop owner said to keep tires at 75 to 85 PSI.