The question that seems to be on many peoples minds when preparing for a time trial is, 'Where should I mount my water bottle' If you're opting to go with a rear hydration system, just to be a little more aero, rethink your decision and throw down a few dollars for the Arundel Chrono Water Bottle and Cage. Barely wider than the average downtube, the Chrono has a fairing effect proven to make your bike more aerodynamic than having no cage on your bike. Setting itself apart from other cages, you'll find the Chrono cage doesn't hug the bottle, but rather, the bottle is molded to snap into the cage. No cage arms sticking out across your downtube means substantially less drag it's an elemental part of the Chrono's near invisible profile. The bottle clicks in and out of the cage with ease, and when the bottle is in the cage it won't eject from it. If you've been time trialing with one of those bulky between the aero bar bottles with a straw sticking out of it it's time for an upgrade. The Chrono is more aero, less clunky, and it contains more than enough water for a 40km TT. The claimed combined weight of the Arundel Chrono Bottle and Cage 120g. The bottle holds 22oz.