The Bontrager Speed Concept Draft Box II is built to conveniently stow your ride essentials and remain completely integrated and aerodynamic. With easy mounting directly to the Speed Concept down tube, the Draft Pack II offers the additional storage you need without the added drag.Bontrager Speed Concept Draft Box II FeaturesCompatible with the current Trek Speed Concept (2014-present)Wind tunnel-proven to create zero additional dragThe quick-release mount allows the box to be completely removed from the bikeBontrager Speed Concept Draft Box II SpecificationsCargo capacity: 62 cu in (1.02L )Bag type: Frame bags and boxesDimensions: 12cm (l) x 4cm (w) x 14cm (h)Attachment: Frame-mountedFibre content: 100% NylonMaterial: WovenWeight: 224g More info