depends which ones your talkin about fornt or rear. personally I run with no fronts because they dont seem to stop anything form hitting me and they look like ass. id probably run with no rears either if I had a clamp on filter
i gotta say that when I ride the muddy trails with no fronts at all , and full rears I still get completely covered in mud , if you dont wanna get muddy find some 4x4 fenders and swap em on