I have no desire to fit a computer to my bike; it would probably give me way more information than I need.
If I were seriously training for competition it would be a different matter, but now a days I ride for two reasons only. Physical fitness and pleasure.
The two go hand in hand; the more physically fit I become, the more my riding pleasure. The more my riding pleasure, the more I ride, which leads to increased physical fitness.
It is not necessary that I know my exact speed and mileage. However, I have a regular seven-mile circuit that I ride on; it takes in quite residential streets and some yet to be developed areas of the city. As my fitness increases, the more laps of the circuit I complete.
When I was doing up to five laps there was no problem, but now I am doing 7, 8, or 9 laps it becomes difficult to keep track. So, I installed this simple counting device; five beads on my brake cable housing.
When I start my ride, I reset my computer by sliding all five beads to just above my brake lever. Each lap completed, I slide one bead to rest just above my front brake.
The circuit is in a rough “T” formation; there are three dead turns. Each turn is at the end of a stretch of divided highway, so I ride on the left as I approach the turn. That way I do not have to cut across traffic behind me when I turn.
There are also three speed bumps to negotiate, and eight stop signs. Because of all this stopping and starting, this circuit is not particularly fast.
However, I am not out to break any speed records, and it makes for some excellent interval training, which is really the best in terms of burning calories and achieving aerobic fitness.
My immediate goal is to reach ten laps, (70 miles.) and by the end of this year when the weather cools, a century. (15 laps, 105 miles.) I like it because I pass my home on every lap and I can make a pit stop whenever I need to; replenish water and get something to eat.
My low-tech computer never needs batteries, and is unaffected by moisture and vibration. Of course, it will only work on the old skool, non-aero brake levers with the exterior cables.