This aluminum rear bicycle bag carrier comes complete with with universal fittings set and is designed for use on bicycle frame with rear-eyelets. If your bicycle frame does not have rear eyelets it is still possible to install a bicycle bag carrier using P- clamps (not suitable for carbon fibre frames!)

Designed to fit 26-28" bicycles this carrier is adjustable

This makes a good base for baskets and racks such as this or this