why do the fastest bicycles have really thin tyres but the fastest cars have very wide tyres

Question

why do the fastest bicycles have really thin tyres but the fastest cars have very wide tyres

In: Engineering

Answer 1

That’s actually not true for bike tires. On a perfect surface skinny tires are faster but on normal road conditions a slightly wider tire is faster. That’s why pro’s have gone from 19mm tires up to 25mm tires recently.