Several Cervelo aero bikes and the Aspero- series feature toptube mounting bosses for storage or bento-style bags. The Smartpak 400A was specifically designed for the Aspero, but plays well with other models. The waterproof rectangular bag has a sleek aero shape that matches tube profiles and width, integrating the bag with the frame design for impressive aero efficiency.

A base plate mount is included for the Aspero frame. The bag itself features a large denier weave that handles the stress of the mount and the sealed zipper. The sides are a lighter weight waterproof synthetic and the assembly has welded seams. Two mounting bolt are included.