Though certainly no match for its supercar namesake in a race, the approximately $39,000 Factor Bikes Aston Martin One-77 Cycle (www.factorbikes.com) does share at least one element with the vehicle: carbon fiber. The handlebars, forks, and frame are made of the material, enabling the bike to weigh a svelte 21 pounds. Leather covers the saddle and handlebars, and an integrated computer monitors distance, pedal torque, the rider’s heart rate, and other metrics. All of this data can be recorded and downloaded for analysis. Factor Bikes—an offshoot of Bf1 Systems, a British aerospace and automotive engineering firm that has provided electronic components for Aston Martin automobiles—will build only 77 examples of the bike, customizing each according to its rider’s measurements.