"what kind of bike?"

well, right now, what i actually have is a road bike with mountain bike fenders.


"With chromoplastic material, you can drill and rivet on some plastic from a detergent bottle."

that's pretty much what i've done already. the length of the front fender is not the problem, it's the fact that wind is blowing water off the sides. yes, i'm sure that's it. because i looked while riding.

i suspect i either have to deal with it, or use narrow, close-to-the-tire fenders instead of wider, far-from-the tire fenders as i am now.