The TransIt Seatpost Pannier Rack 2 allows riders to mount a set of pannier bags on bikes without threaded eyelets. This is a great option for full-suspension bikes, hardtails, commuters, and many road bikes. Note: This rack is not designed for use with carbon fiber seatposts Features: Attaches securely with four allen bolts Compatible with most standard 25.0 - 31.6mm seatposts (not for use with carbon seatposts) Adjustable load shelf can be moved 35mm fore and aft for optimum load positioning Made from tough, heat-treating 6000 series aluminum Durable powdercoat finish 25 lbs carrying capacity