"Bottles shall not be integrated to the frame and may only be located on the down and seat tubes on the inside of the frame. The maximum dimensions of the cross-section of a bottle used in competition must not exceed 10 cm or be less than 4 cm and their capacity must be a minimum of 400 ml and a maximum of 800 ml."
What I find interesting is that most riders have the arm pads very close together, apart from one guy second from bottom right (Wiggins?) who has them really far apart.
Article 1.3.024:
"Bottles shall not be integrated to the frame and may only be located on the down and seat tubes on the inside of the frame. The maximum dimensions of the cross-section of a bottle used in competition must not exceed 10 cm or be less than 4 cm and their capacity must be a minimum of 400 ml and a maximum of 800 ml."
What I find interesting is that most riders have the arm pads very close together, apart from one guy second from bottom right (Wiggins?) who has them really far apart.