Axiom's Flip-Flop LX Spring Seatpost Rack is perfect for hard-to-fit bikes like full-suspension models, ones with disc brakes and those without frame eyelets. This easy on/off quick-release rack is made of light and strong hand- and double-welded tubular 6061 T6 aluminum and it boasts a flip-flop support arm for mounting the rack in a high or low position, which lets it fit on most bicycles. There's ample carrying capacity with a spacious top platform that's perfect for trunk bags (sold separately) and that includes a spring-loaded bar to hold down things. You can also slide off the platform with the bag attached for convenience, and slide the platform in when not in use so it takes up less space.
Fits on seatposts from 25.4 to 33mm in diameter
Carrying capacity: 33 pounds (15kg)
Platform dimensions (L x W): 325mm x 125mm
Weight: 982 grams
Flip-Flop seatpost mount rear bike racks