Specialized S-Works Tarmac SL8 Frameset

The S-Works Tarmac SL8 frameset represents the definitive evolution of the high-performance road bike. After more than twenty years of development and eight generations of innovation, Specialized has created the fastest Tarmac ever: a platform that combines aerodynamics, lightness, and ride quality at an unprecedented level.

Designed to excel in every situation, the Tarmac SL8 was developed through advanced Ride Science simulations based on real data. The result is a faster bike on any route: from long flats to the most challenging climbs, up to the great Monument Classics.

Evolved Aerodynamics: Aero in Everything

The new S-Works Tarmac SL8 introduces a revolutionary aerodynamic concept: improving air efficiency where it truly matters, which is on the leading edge of the bike.

The new "Speed Sniffer" front section optimizes airflow thanks to a sharper headtube design, significantly reducing aerodynamic drag. The new ultra-thin seatpost was also developed to improve airflow around the rider's legs.

The result is a bike that is even more aerodynamic than the Specialized Venge, while maintaining reduced weight and reference-level handling.

Minimum Weight, Maximum Performance

Thanks to technologies derived from the Aethos platform, the Tarmac SL8 frameset achieves an incredible weight of only 685 grams, making it 15% lighter than the previous Tarmac SL7.

The FACT 12r Carbon structure utilizes intelligent load distribution, allowing for the elimination of superfluous material without compromising stiffness and reactivity. This results in an extremely lightweight bike, perfect for the toughest climbs and most violent accelerations.

Uncompromising Stiffness and Comfort

The stiffness-to-weight ratio improves by 33% compared to the Tarmac SL7, offering even more efficient power transfer and exceptional steering precision.

Rider-First Engineered™ technology guarantees the same ride quality across all sizes, while vertical compliance increases by 6%, improving vibration absorption and stability over long distances.

The proven racing geometry and tire clearance up to 32mm ensure maximum versatility in both competitions and demanding training sessions.

Beyond Gender

Specialized develops the Tarmac SL8 following the Beyond Gender philosophy: there are no specific male or female frames, but a single platform designed to offer the best performance to every cyclist, regardless of gender.

Technical Features

Frame

• S-Works Tarmac SL8 FACT 12r Carbon
• Rider First Engineered™
• Win Tunnel Engineered
• Clean Routing internal cable routing
• Ceramic Speed SLT headset bearings
• Threaded bottom bracket
• 12x142 mm thru-axle
• Flat Mount disc brakes

Fork

• S-Works FACT 12r Carbon
• 12x100 mm thru-axle
• Flat-mount disc

Cockpit

• S-Works Tarmac SL8 Carbon seatpost
• FACT Carbon
• 15 mm offset

Seat Clamp

• Tarmac integrated wedge

Included Accessories

• SWAT headset spacer kit compatible with SL7 stem and Roval Rapide cockpit

Product Specifications

• Product code: 221575
• Complete frame weight: 1.38 kg (size 56)
• Tire compatibility: up to 32 mm
• Bottom bracket: 68 mm threaded

The Specialized S-Works Tarmac SL8 frameset is the ultimate choice for those who want to build an uncompromising road bike, designed to win on any terrain.

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.

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.