The ACID Carrier SIC RAIL 29" BOOST is our slimline, minimalist take on stylish practicality. It's the easy way to attach panniers for extra load-carrying capacity. And it's retrofit compatible with the ACID Top RAIL RILink to add even more cargo volume plus the RILink interface. This luggage carrier is compatible with CUBE bikes with 29in wheels, Boost standard and the SIC frame interface.