The Cervelo S5 RED AXS 1 2027 bike we’re featuring at Escapa is an aerodynamic road bike designed to turn every watt into speed. Developed for top-level competition, it combines an optimized frame, a new integrated Cockpit, and Reserve wheels specifically designed as part of the aerodynamic package.
The new generation is 6.3 watts faster and 124 grams lighter than its predecessor, while maintaining the stability, precision, and confidence required of a bike capable of competing in sprints, fast stages, and demanding courses.
6.3 watts faster
The main aerodynamic improvements are concentrated at the front of the bike, a critical area for managing airflow. Cervélo has increased the depth of the head tube and fork legs, reducing drag without compromising the bike’s handling.
The asymmetrical profiles of the seat tube and rear wheel also work together to smooth airflow. According to Cervélo, this evolution makes the new S5 about 6.3 watts more efficient than the previous model and at least 5 watts faster than the leading competitor bikes used as benchmarks by the brand.
Lighter Without Sacrificing Aerodynamics
Increasing the depth of the profiles usually means adding material and weight. However, Cervélo has optimized the carbon layup and bonding elements to reduce weight by 124 grams compared to the previous S5.
The result is a more responsive aero bike, capable of accelerating quickly and responding better to changes in pace, steep climbs, and situations where competition demands more than just maintaining speed.
New HB19 Plus-Four Cockpit
The integrated Cervélo HB19 Cockpit updates the S5’s signature V-Stem concept with a one-piece carbon construction. Its integration improves aerodynamic efficiency and reduces the number of components exposed to the air.
The Plus-Four design makes the handlebars 4 cm narrower at the shifters than at the lower ends. For example, a 38/42 cm configuration measures 38 cm at the shifters and 42 cm at the lower ends. This geometry helps maintain a more aerodynamic position when riding on the shifters, while preserving width and stability for sprinting and descending.
All sizes comply with current UCI regulations. In addition, Cervélo offers nine combinations of handlebar width and stem length to achieve a precise fit. Under the brand’s terms, an authorized dealer will help you select the appropriate combination at no additional cost.
Race Geometry
The Cervélo S5 features aggressive, speed-oriented geometry while maintaining the control needed to tackle descents, fast corners, and long race days.
The Trail remains constant at 55.6 mm across all sizes, providing consistent handling regardless of the rider’s height. The 405 mm chainstays promote a compact and responsive rear end, particularly effective during accelerations and sprints.
Cervélo S5 Red AXS 1
Single-chainring version with SRAM RED AXS, 50-tooth chainring, 10-36T cassette, shifter, and ceramic bottom bracket.
It is equipped with Reserve 42|49TA wheels featuring Dt Swiss 180 hubs and carbon spokes.
It has an approximate weight of 6.74 kg.
