Road Bicycle Fenders
Some road bicycles have fender eyelets in the hand and nearby the backside dropouts (newer eyelets are slightly concealed to protect the visual on some models). You just buy the fenders and put all of them on. I'd say many non-race bikes have all of them, and ones that are widely used for commuting or touring will nearly undoubtedly have them. Then you purchase a set of fenders, and bolt them on.
You may make use of clip on mudguards and fenders (example. to your seatpost), just like the SKS X-board and SKS X-tra dried out.
This style clips onto the downtube in lieu of a front fender:
This design clips on the seatpost as a back fender:
Another design is this (from Planet Bike):
These don't supply all the benefits of a suitable fender (example. protecting the drivetrain) but block a number of the dirt and liquid and may be installed on any bike, also a mountain bike:
Eventually, some people only have damp and dirty or do not simply take their roadway bikes out in the rainfall. Observe that road bikes usually do not provide the maximum amount of crud up as hill bikes since their particular tires tend to be smaller.
My road-bike has actually a SKS X-tra Dry seatpost back fender, and the front side is just plain. It utilizes 700x28 tires, and I also realize that the front doesn't toss all that much up that We care about it in excess. The trunk is pretty well covered by the seatpost fender, thus I do not have skunk stripe.