Specialized Tarmac SL8 Pro Bike (2025)

Specialized Tarmac SL8 Pro Road Bike 2025, Grey. Specialized Reference: 94925-1354

There is nothing faster than the Tarmac SL8. Why? The combination we've achieved between aerodynamics, lightness, and a ride quality that seemed impossible until recently. Eight generations later and after more than two decades of development, it’s not only the fastest Tarmac ever: it’s also the fastest race bike in the world.

Races aren't won solely through aerodynamics or lightness: the key is speed. And to achieve it, you need an uncompromising combination of aerodynamics, lightness, stiffness, and comfort. Our Ride Science team has simulated races with real data and found that the Tarmac SL8 is the fastest road bike ever made on the most important routes: 16.6 seconds faster over 40 km, 128 seconds faster at the Milan San Remo, and 20 seconds faster on the legendary Tourmalet climb.

• 100% AERO: We've placed aerodynamic elements where they're truly needed, not just where they look good. And, in doing so, we've created our most aerodynamic road bike. Yes, even more than the Venge. With the Speed Sniffer, the new nose cone of the Tarmac, clean air is optimized for maximum advantage. By moving the head tube back (which determines the angle of the head tube), the leading edge of the head tube becomes much sharper, creating a shape with much less aerodynamic drag. Taking advantage of the new UCI rules, the Tarmac SL8 has the narrowest and most aerodynamic seat post we've ever made. This way, the dirty air around the legs flows more cleanly backward. Winning sure tastes sweet, doesn’t it?

• MINIMUM WEIGHT, MAXIMUM AERODYNAMICS: Thanks to lessons learned from the Aethos, the Tarmac SL8 has been designed to meet the UCI minimum requirements and offer a 100% aero build. The team has created an incredible 685-gram frame, 15% lighter than the Tarmac SL7 and lighter than any other frame in the World Tour*. We've also applied what we learned from the Aethos to prioritize the lightness of the downtube, seat tube, and rear of the bike. The frame shape supports the load so efficiently that extra layers of carbon aren’t needed. *Unless you count the time Kasper Asgreen rode our 585-gram Aethos frame in a Tour de France stage.

• ROCKET-LIKE SPEED, LUXURIOUS RIDE: With an optimized stiffness-to-weight ratio (33% better than the SL7), the Tarmac SL8 delivers legendary handling, aggressive response, and World Championship-proven geometry that is on another level. The bike is stiffer at the pedals, more precise at the handlebars, and more comfortable in the saddle, setting a new standard for comfort in race bikes. Thanks to our Rider-First Engineering, all riders, regardless of size, can enjoy unprecedented ride quality and control. In the saddle, the Tarmac SL8 offers 6% more comfort: it floats over rough terrain and offers a smoothness that isn’t often found in the demanding world of race bikes. The Tarmac’s geometry and 32mm tire clearance are identical to the SL7, ensuring easy adaptation and the option to use larger tires when needed.

• BEYOND GENDER: We can find more differences between two male riders than between a man and a woman. Gender alone doesn’t provide enough data to be the only factor when designing a bike. That's why creating bikes just for men or women is a thing of the past. All cyclists can enjoy the benefits of the Tarmac SL8. It's time to go Beyond Gender.

• The Tarmac SL8 Pro offers exceptional performance. It comes with a complete Shimano Ultegra 8100 series Di2 groupset with a power meter, a set of Roval Rapide CL II wheels, tubeless-ready, and a Roval Rapide handlebar combined with an SL7 stem. It has everything you need to race right out of the box.

Technical Specifications

Frameset

• FRAME: Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
• FORK: FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc

DRIVETRAIN

• CHAINRINGS: 52/36T
• REAR DERAILLEUR: Shimano Ultegra Di2 R8150, 12-speed
• SHIFT LEVERS: Shimano Ultegra Di2 R8170, hydraulic disc
• CRANKSET: Shimano Ultegra R8100 with 4iiii power meter
• FRONT DERAILLEUR: Shimano Ultegra Di2 R8150, braze-on
• CASSETTE: Shimano Ultegra, 12-speed, 11-30t
• BOTTOM BRACKET: Shimano Threaded BSA
• CHAIN: Shimano Ultegra, 12-speed

WEIGHT

• WEIGHT: 56cm
• WEIGHT: 7.16 kg

COCKPIT

• SADDLE: Power Pro with Mirror
• HANDLEBAR: Roval Rapide Cockpit, Integrated Bar/Stem
• SEATPOST: S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
• STEM: Tarmac integrated stem, 6-degree
• TAPE: Supacaz Super Sticky Kush

WHEELS & TIRES

• TUBES: Turbo Ultralight, 60mm Presta valve
• FRONT WHEEL: Roval Rapide CL II, 21mm internal width carbon rim tubeless ready, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Revolution spokes, 51mm depth
• REAR WHEEL: Roval Rapide CL II, 21mm internal width carbon rim tubeless ready, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Revolution spokes, 60mm depth
• FRONT TIRE: S-Works Turbo, 2BR, 700x26mm
• REAR TIRE: S-Works Turbo, 2BR, 700x26mm

BRAKES

• FRONT BRAKE: Shimano Ultegra Di2 R8170, hydraulic disc
• REAR BRAKE: Shimano Ultegra Di2 R8170, hydraulic disc