Cervélo's all-new S5 takes the concept of an aero road bike to new levels. On the one hand it's a clear progression from the Soloist/S3 design but then there's the radical aerodynamic features that have merged into the design from the P3/P4 line.
At under 1000 grams, some 270 grams lighter than the S5, this frame combines all of our aerodynamic knowledge plus everything we have learned from the Project California R5ca to offer performance absolutely unmatched in the aero road category.
The key new features of the design are:
Dropped downtube: this smoothes out the airflow from the fork to the frame and minimises turbulence behind the crown.
BBright: Cervélo's proven (on the R-series road frames) take on oversized bottom brackets and asymmetric chainstays makes for a lighter yet stiffer pedalling platform.
Extended cutout: the radical rear wheel cut-out smoothes out the airflow between the frame and the rear wheel. If it's good enough for the P4...
Shielded brake: the seat stay design has been created to shield the rear brake, one of the biggest causes of turbulence.
Multiple bottle positions: yes, your bottle affects the airflow so the S5 frameset has multiple bottle mount positions to allow maximum flexibility - why didn't anyone else ever think of this?