What is a racing driver?

Racing handlebar: one forward, below and then bent back to the back, which is mostly used for racing bikes. Therefore often referred to as racing wheelers.

Racing driver:
A forward, below and then curved handlebar, which is mostly used for racing bikes. Therefore often referred to as racing wheelers. The brake/gear lever combinations of the switching/braking groups are attached to the racing bike.

Relevant contributions:
Set the frame size on the bike