While we have just 5 contact points with the bike, each of those contact points are made of whole systems of contact points. And your tires are the ONLY contact points between the bicycle and the earth. Think about it: all the forces, traction, braking, cornering, all have to be transferred through tiny patches of rubber, dynamically moving on the surface of the earth. Clearly, contact points aren’t as obvious as they seem, which makes them a perfect topic for...Marginal Gains!
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