Originally Posted by
Slackerprince
I seem to get flats from the base of the valve stem, basically, where the valve stem meets the tube, and I'm wondering if that's just basic wear or what.
Also, should I be tightening the ring nut on the valve stem onto the rim pretty hard, or leave a little play?
These are 700 X 23 and I usually go pretty high-pressure, around 120.
I live in Florida, so wondering if the heat is an issue. Bike is garage kept, no A/C, so it might just be time, wear, etc.
Hope you can help with suggestions.
Thanks!
S
Probably as mentioned, rough metal around the valve stem opening. I like to use a countersink in a chuck and turn it by hand to deburr those edges. You`ve probably bot a double walled rim and the depressions in the rim tape over the spoke holes are a small indication of the amount of pressure that 120PSI puts on things.
I`m also assuming you have Presta valves and that the rims aren`t drilled out for Schrader valves. Otherwise a plastic sleeve/adapter is a good idea at those pressures.
If you actually have Schrader valves because thats what your rims are drilled for - suggest you try some Schwalbe tubes. Not all Schrader tubes are built to take that kind of pressure.