SKS GRAND D.A.D.

Dual Adjustible Dirtboard
Mountain Oversized Mudguard

Made for sludge and mud lovers. The new two part Quick Release Dirtboard
GRAND D.A.D. (dual adjust dirtboard) fits nearly all forks and is
simple to mount.
The extra wide board guarantees optimal dirt protection due to its high
quality dual compound plastic (the back connection of the board consists
of the softer component) in extreme conditions wheel contact is not a
problem.
You don´t get better than that.