Cervélo S5 Red AXS E1 Bicycle

Cervélo S5 Red AXS: the aero road bike designed to win

The Cervélo S5 Red AXS represents the evolution of the renowned Canadian brand's aero bike, engineered to deliver absolute top-tier performance for the most demanding cyclists. Designed for competitions, granfondos, and high-speed use, the new S5 combines advanced aerodynamics, lightness, and stiffness in a frame developed alongside WorldTour professionals.

Victories in major international competitions, with athletes of the caliber of Wout van Aert and Simon Yates, confirm the quality of a project that has become a benchmark in the aero road bike segment.

Uncompromising Aerodynamics

The new Cervélo S5 has been completely redesigned to further reduce aerodynamic drag. Wind tunnel tests show a performance increase of 6.3 Watts compared to the previous generation (tests conducted at 30 mph), thanks to significant development work focused primarily on the front of the bicycle.

Key new features include:

• new Bayonet fork with enlarged fork legs;
• redesigned head tube;
• fully integrated cockpit;
• improved integration between seat tube and rear wheel;
• optimized profiles to reduce air flow turbulence.

According to tests conducted by Cervélo, the new S5 is also at least 5 Watts faster than the main competing models in the same category.

Faster and Lighter

In addition to aerodynamic improvements, the new generation of the S5 sees a reduction of 124 grams compared to the previous model.

This result was achieved through the optimization of carbon layup and hardware, while maintaining the same values of stiffness, steering precision, stability, and responsiveness that have made this platform famous.

The total weight of the bicycle is only 7.3 kg.

New Cervélo HB19 One-Piece Cockpit

One of the most distinctive features of the new S5 is the new Cervélo HB19 Carbon integrated handlebar, designed according to the Plus-Four concept.

The upper part of the handlebar is 4 cm narrower than the drops (e.g., 38/42 cm), allowing the cyclist to:

• adopt a more aerodynamic position while pedaling;
• maintain greater control during sprints;
• increase stability on high-speed descents.

All measurements comply with UCI regulations, and the system allows for cockpit replacement with a different size within the first 60 days of purchase, to achieve the best possible fitting.

Reserve 57|64 Turbulent Aero Wheels

The Cervélo S5 Red AXS is equipped with the new Reserve 57|64 Turbulent Aero wheelset, jointly developed by Cervélo and Reserve directly in the wind tunnel alongside the frame.

The combination of frame profiles and the asymmetry of the rear wheel further reduces aerodynamic drag.

Compared to the previous Reserve 52|63, the new set offers a 3 Watt advantage, while maintaining the same overall weight.

Customized Fitting

For maximum aerodynamic efficiency, a correct riding position is essential.

For this reason, Cervélo offers nine different integrated handlebar and stem combinations, allowing the authorized dealer to configure the bike according to the cyclist's needs at no additional cost.

Why choose the Cervélo S5 Red AXS

• Latest generation aero frame developed for the WorldTour
• Over 6 Watts aerodynamic advantage over the previous version
• Reduced weight of 124 grams
• Cervélo HB19 Carbon integrated cockpit
• SRAM Red AXS E1 electronic groupset
• Integrated power meter
• Reserve 57|64 Turbulent Aero wheels
• Premium components
• High performance in races, training, and granfondos

Technical Specifications

Available Sizes

• 48 cm
• 51 cm
• 54 cm
• 56 cm
• 58 cm
• 61 cm

Weight

• 7.3 kg

Frame and Fork

• Fork: Cervélo All-Carbon Bayonet S5 Fork

Cockpit

• Integrated Handlebar: Cervélo HB19 Carbon

Handlebar Width

• Size 48: 36 cm
• Size 51: 38 cm
• Size 54: 40 cm
• Size 56: 40 cm
• Size 58: 40 cm
• Size 61: 40 cm

Stem Length

• Size 48: 80 mm
• Size 51: 90 mm
• Size 54: 100 mm
• Size 56: 100 mm
• Size 58: 110 mm
• Size 61: 120 mm

Seatpost

• Cervélo SP34 Carbon

Seatpost Offset

• Size 48: 0 mm
• Size 51: 0 mm
• Size 54: 0 mm
• Size 56: 0 mm
• Size 58: 0 mm
• Size 61: 15 mm

Saddle

• Fizik Arione R1 Light

Bottom Bracket

• SRAM DUB Ceramic, BBright

Headset

• FSA SL IS2 1-1/8", 36° x 45° / 1-3/8", 36° x 45°

Thru Axles

Front

• Cervélo Aero Thru Axle Front
• M12x1.5 mm
• Length 122 mm

Rear

• Cervélo Aero Thru Axle Rear
• M12x1.0 mm
• Length 169 mm

Wheels

Front

• Reserve 57TA
• Hub DT Swiss 180
• 12x100 mm
• 24H
• Centerlock
• Tubeless Ready

Rear

• Reserve 64TA
• Hub DT Swiss 180
• 12x142 mm
• XDR Driver Body
• 24H
• Centerlock
• Tubeless Ready

Tires

• Vittoria Corsa Pro TLR G2.0 700x29c

Drivetrain

• Brake Levers: SRAM Red AXS E1
• Crankset: SRAM Red AXS E1 50/37T DUB with power meter
• Chain: SRAM Red E1
• Cassette: SRAM Red E1 10-33T 12 speed
• Front Derailleur: SRAM Red AXS E1
• Rear Derailleur: SRAM Red AXS E1

Crank Length

• Size 48: 160 mm
• Size 51: 165 mm
• Size 54: 170 mm
• Size 56: 170 mm
• Size 58: 172.5 mm
• Size 61: 172.5 mm

Brakes

• SRAM Paceline X Centerlock Rotors

Included Accessories

• Cervélo Rear Accessory Mount
• Cervélo Front Computer/Accessory Mount 266

Please Note

Technical specifications may vary without prior notice based on component availability.
Product images are for illustrative purposes only and may not exactly reflect the described features.

The Cervélo S5 Red AXS is the ideal choice for those who desire a top-tier aero road bike, capable of offering speed, precise handling, and cutting-edge technologies. If your goal is to achieve maximum performance in races and the most demanding training sessions, this is one of the most advanced bicycles available on the market.

Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly

A Complete Guide to Bike Sizes

Foreword: Not all bike sizes are the same

Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.

Bicycle adjustment margins

Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.

How to use size charts

We've created a simple guide to help you find the right bike size:

1. Check out our size charts for each bike type.
2. Learn more with specific tips to help you make the right choice.

Size Charts: Find Your Perfect Bike

Gravel and road bikes

Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.

For gravel, measurements may vary slightly due to different geometries, but remain similar.

Mountain bike

MTBs are measured in inches, based on the seat tube.

Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .

Children's bikes

The size depends on the size of the wheels, often associated with age:

What to do with half measures?

If you are between two sizes:

• Comfort : Choose the larger size.
• Performance : Go for the smaller size.

Final tips for choosing

1. Consult the manufacturer's instructions : Always check the brand's guidelines.
2. Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
3. Test the bike : If possible, test the model you intend to purchase.