9781422286784

to meet a minimum weight for their bikes. The International Cycling Union puts that lower limit at 15 pounds (6.8 kg). The super- strong but super-light composite carbon fiber materials reduce the weight of the frame and gearing so much that the best bikes have got- ten lighter and lighter. To create a level field for all teams, the UCI (the group’s initials in French) put the minimum in place. The bikes’ composite materials use some of the high-impact product found in bullet- proof vests or high-performance race cars. Woven strands of carbon and other materials condense to steel-like hardness but without the weight of the metal. To make their bikes reach the minimum, bike teams can add pow- er meters that measure the rider’s energy out- put as well as measure stresses on the bike, adding tech to an already tech-heavy machine.

Lightweight road bikes have helped cyclists increase speed and reduce time for long races.

stem in sports: technology

54