The Cervélo P4’s crotch between the head tube/fork and the down tube has been filled in for smoother air flow. The water bottle fills the crotch between the down tube and the seat tube. It pulls out like a normal bottle, but the bike is faster with it in place. The rear brake is hidden from view beneath the chainstays and from the wind by a cover.  |  Photo: Lennard Zinn
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Cervélo P4 - a close look
The Cervélo P4’s crotch between the head tube/fork and the down tube has been filled in for smoother air flow. The water bottle fills the crotch between the down tube and the seat tube. It pulls out like a normal bottle, but the bike is faster with it in place. The rear brake is hidden from view beneath the chainstays and from the wind by a cover.  |  Photo: Lennard Zinn
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