on a racer (on the drops) your head is pointing downwards, your eyes are at the top of their movement. A peak obstructs this view. (this is why cycling caps have small peaks that can be flipped up)
on a mountain bike, you sit upright, a peak helps to keep rain and forest shite off your glasses/out of your eyes. Riding a woodland trail on a sunny day often gives you a rapidly changing light as you move under different densities of tree cover, a peak helps even things out for your eyes.
obviously this isn't true in everyone's case, but it's a generalisation
riding position.
on a racer (on the drops) your head is pointing downwards, your eyes are at the top of their movement. A peak obstructs this view. (this is why cycling caps have small peaks that can be flipped up)
on a mountain bike, you sit upright, a peak helps to keep rain and forest shite off your glasses/out of your eyes. Riding a woodland trail on a sunny day often gives you a rapidly changing light as you move under different densities of tree cover, a peak helps even things out for your eyes.
obviously this isn't true in everyone's case, but it's a generalisation