Rally Sport / Rally cycle computer – umsc03schwe1# – for Schwinn bicycles
LR44 battery, alkaline 1.5 volt button cell, now replaced by 357/303 or just 357 battery.
The display on the screen of the cycle computer was getting dim, and I couldn’t find the manual that came with it until today. I was able to putz around with the single button that is found on the back of the unit before finding the manual. But I figure that other people might have the same cycle computer and not know how to re-set everything after replacing the button cell battery.
The battery used to go by “LR44”, I think that is the alkaline version, and that the silver-oxide version is “357” or “357/303”.
The “c” is for the circumference of the bicycle in millimeters. You take the diameter of the bicycle tire, mine is 26 inches. Convert to millimeters, that brings us to 660.4
Then multiply by 3.1416 to get the circumference. Circumference = pi times diameter.
THAT is what you have to enter after the “c”. You can also set the time, choose between km/h and mph, etc.