The topeak toploader frame bag the toploader is a large capacity top tube mounted bag giving bikepackers quick and easy access to energy bars phone wallet tools or any small essential gear they need close at hand topeak toploader frame bag features lightweight polyethylenenylon construction main compartment with dividers mounts to tubes between 34 75mm diameter mounts to headtubes between 35 46mm integrated rain cover 075l capacity 235x12x7cm 169g nbs