I realize this will probably not help @
kalash74, but for those considering these fenders with tires over 50 mm, you might want to do what I did.
These (the ones this thread is about) are the widest fenders Velo Orange offers for 26" wheels.
But they offer a fluted fender that is wider, intended for use with 29'er tires:
VO Fluted 63mm Fenders, 700c - 700c - Fenders, Accessories, Hardware - Accessories
It is not difficult to re-radius them to fit 26" wheels. In the process they get a bit wider, and consequently fit very nicely over Compass Rat Trap Pass tires:
