I have been speeding around on a new bike this weekend, a cheap-o fixed gear I picked up in order to study for the Gadget Lab build-a-fixie project. I’m hooked — it’s so much fun riding the thing.

We may receive a commission on purchases made from links. Compared to driving a car, some might consider riding a bicycle to be a far more low-tech experience. A veteran cyclist will tell you, though, ...