Andre Jute wrote:
[..]
It is good to think about these things. I wonder every time I see a
rear disc brake on a bike what it is *for*.[...]

Mud clearance on an ATB.

Useful braking on a recumbent with rearward weight distribution.

Prevention of rim erosion on any bike ridden in wet weather.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful