Originally Posted by
no motor?
Schraeder valves aren't all peaches and cream, I've had a few flats with the tube ripping by the Schraeder valve after many weeks of checking the pressure.
I know I've seen Schraeders threaded all the way down, with a ring just like a Presta to hold them in place on the rim. Not sure what tube brands use them, but they're great for many of the same reasons that we like Prestas; no chasing the stem to get the air chuck on it when the tube is completely flat, and less prone to ripping the tube like that.