-
I agree that this is long enough, and would be perfect with a flap. It's possible that Berthoud has some length inconsistencies across their range, as my 700c Berthoud was not as long.
Judging from my picture above, it reached the same point as yours, but with a flap. This was good enough for my feet, but didn't protect the BB and drivetrain as well as my longboard.My longboard, for comparison (ignore the BDHU, it's an old picture). Looks like shit, works well. It's hard to see from the picture, but the bottom of the flap is less than 4 cm off the ground.
Fun fact: the short and long version of Berthoud guards only differ in the above the wheel part of the front guard. Like you say, in case you run a front rack, the long guards are more suitable.
Obviously you can decide to rotate the front guard to your own desire, but since Berthoud guards come predrilled at the crown area, you’d have to cover that hole if you don’t intend to use it. Long story short: in most cases choosing long over short Berthoud guards won’t give you more coverage at the toes.