On some rides you want a fender. This Universal Fender is designed for quick and easy installation on road, mountain, gravel, or city bikes so that riding with a fender on any bike can be a game-time decision. The versatile attachment clamp securely mounts most seatposts, and the front and rear set are designed to work with tire widths from 700x23 all the way up to 27.5/29 x 2.8.