I'm a 50+ who has returned to bicycling in a bit more serious way than just going for a spin around the block. Nothing too much, maybe the odd day trip, or even an overnighter at a B&B or motel.
I got a new bike, really like it, got a fairly simple rack, bottle holders, and an electronic speedo. After fiddling around with it for 15 minutes trying to program it, I gave up. No, I'm not a Luddite, I love my laptop, iPad, internet radio, etc.
All I want to know is how fast I'm going and how far I've gone. I don't need, or want, a clock, a stop watch, a defibrillator, a moon cycle indicator or a weather report in Tuktayuktuk.
Is there such a thing? Mechanical or electronic? Actually, mechanical sounds pretty good because you don't have to worry about batteries.