Aero BTS systemThe same wide V formation and saddle clamp as the Aero BTS PRO 14 W faster than two bottles mounted close together (n=17 athletes, 45 km h, 0 yaw) at 60 g less and 50 less. 800 ml of integrated storage inner tubes, CO2, tools, tyre lever Same bottle positions as the PRO same wide V geometry, same saddle clamp system ~290 g, holds 2 1000 ml bottles 212 W faster than riding with no rear bottles at all (same test conditions)