In addition to the aero handlebar cage mount, the 9.9 comes with an improved rear Draft Box with increased volume to fit more gear. More practical and easier to mount and dismount than its predecessor, the new design makes you faster. My only suggestion would be to tape down the lid to the Draft Box, which popped open occasionally over particularly bumpy road or railway crossings. While it does have a pop in button to keep it locked down, a small extra precaution can’t hurt. Our test bike also came with the Speed Box storage option on the top tube that holds up to seven gels. Its rubber f lap allows easy access while remaining secure.