Specialized Tarmac SL8 S-Works frame 2025

No bike is as fast as the Tarmac SL8 thanks to a combination of aerodynamics, lightness and ride quality previously thought impossible. After eight generations and over two decades of development, it's not just the fastest Tarmac ever: it's the fastest road bike in the world. Are your legs ready?

Aerodynamics or lightness alone do not win races: what matters is speed. Achieving this speed requires an uncompromising combination of aerodynamics, lightness, stiffness and stress absorption. Thanks to complex simulations using real-world data, the Ride Science Team has verified that the Tarmac SL8 is the fastest race bike on any course: - 16.6 seconds on 40km of flat terrain, 128 seconds faster on the Milan-San Remo course, 20 seconds faster on the Tourmalet climb.

Aerodynamics
Specialized uses aerodynamics where it's needed most, and in the process created the fastest road bike ever - yes, more aerodynamic than even the Venge. The front end has been optimised for maximum benefit. The fork steerer is positioned to the rear of the front of the frame head tube to offer much lower aerodynamic drag. Thanks to new UCI rules, for the SL8 Specialized was able to use the narrowest and most aerodynamic seatpost we have ever made, to ensure that turbulent air in the leg area can flow more easily to the rear of the bike.

Lightness
To create the Tarmac SL8 and make the most aerodynamic bike while meeting UCI's minimum weight requirements, we were inspired by what we learned with the Aethos. The team created a 685 gram frame, 15% lighter than the Tarmac SL7 and lighter than any other World Tour bike*. Focusing on the lightest possible weight in the down tube, seat tube and rear of the bike, we adopted the lessons learned in the design of the Aethos. The shapes of the frame respond so efficiently to stress that it was possible to reduce the thickness of the material, eliminating the superfluous. *Except for the time when Kasper Asgreen raced with our 585-gram Aethos frame during a stage of the Tour.

Ride quality
The stiffness-to-weight ratio of the Tarmac SL8 is 33% better than that of the SL7. The Tarmac SL8 sets a new benchmark in handling: it is precise in the most demanding situations and responds immediately and efficiently to pedal inputs. While the areas that ensure power transfer and steering precision are stiffer than ever, in the saddle the Tarmac SL8 is more comfortable, filtering 6% more stress from the terrain and allowing you to attack corners with a feeling of agility and balance unique in the world of road bikes. The new Tarmac SL8 retains the tried and tested geometry of the SL7 model, with the same generous 32mm tyre clearance so that more volume can be used when needed.

Beyond gender differences
In reality, there can be many more differences between two male cyclists than between a man and a woman. We design according to the individual and our philosophy is simple: Don't create differences where there are none. Every cyclist, male or female, can benefit from the advantages of the Tarmac SL8. It's time to go further. The S-Works Tarmac SL8 frame with a 68mm threaded bottom bracket is the perfect starting point to build the bike of your dreams.

Technical Specifications

Frame

• Frame:S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, threaded BB, 12x142mm through-bolt, flat-mount disc. 685 g frame.

Suspension

• Fork: Carbon S-Works FACT 12r, through-bolt 12x100 mm, flat-mount disc

Well

• Seatpost: S-Works Tarmac SL8 Carbon seatpost, FACT Carbon, 15 mm offset
• Seat post clamp: Tarmac integrated wedge

Accessories

• Headset: SPACERS KIT FOR SL7 HANDLEBAG ATTACHMENT AND ROVAL RAPIDE COCKPIT

Weight

• Manufacturer weight: 1.37kg (3 lb, .3 oz)
• Weighted measurement: 56.

Please note: Specifications may vary without notification.