As mentioned, I got a zip tie one that is about 10inches and covered the downtube. Well all it was good for is keeping my water bottle clean. The problem with road bikes, especially, when compared to my mountain bike, is that road spray gets sprayed in front of the fork and you going fast will simply run into the water. I recently replaced that fender with a full SKS fender which is alot better. So, I would avoid the partial solution and get something that covers the front of the fork too as well.

Jay