The Sochi bobsled course is one of the most technical in the world, with sloping turns and three uphill sections. Drivers will need to steer skillfully to reach a medal-worthy top speed of 80 to 90 mph. “Once the push is complete, they can’t accelerate or brake like they would in a car,” says BMW designer Michael Scully. “Driving a bobsled is hugely dependent on steering.” BMW repositioned and resized the ropes and bungee cords that make up the sled’s steering system to match individual athletes’ preferences. “No two drivers like the exact same setup,” says Mike Dionne, the team’s assistant coach.