Bike speedometer
I have Bell branded bike computer that measures speed, distance, and time. It flashed the warning that the battery was low, so I peeked at the watch battery inside so I would know what replacement to get.
It is a CR1142 battery.
And now the computer has lost its settings. I tried to find the user manual on the web, but alas, Bell doesn't seem to make or support anything but helmets anymore. So I'm stuck with trying to find the user manual in somewhere in meat space. Which is NOT Google indexed.
But Google can help with calibrating this device even without the user manual. Google Earth says that my route is 5.97 miles long. So that is the figure I'll shoot for as I reverse engineer the calibration user interface.
Calibration user interface
When the computer is reset, it follows this sequence for calibration:
- it flashes all LED components
- a 4-digit number. with a default of 2124
- it prompts for Km/hour or mph.
- it prompts for pounds or kilograms.
- it prompts for a 3 digit number of pounds. (is this body weight?) with a default of 80
The top button accepts and advances to the next selection. The bottom button changes the current selection.
Bike geometry
The specs for my bike are available on the Trek web site. But what the computer is probably asking for is wheel size. Here is what Trek says about my model's wheels:
WHEELS:
- Bontrager Select: Durable welded rims, machined for smooth braking; OSB rear rim provides good stiffness for any size rider; Hi-Lo ATB rear hub design w/excellent spoke bracing angles for improved lateral wheel rigidity; Cro-Moly skewers; 780 g, 24h front/1045 g, 28h rear
TIRES:
- Bontrager Jones AC, folding, 26x49/54
