Specialized Tarmac SL8 Pro - Ultegra Di2 Bike (2026)

Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike 2026, Grey. Specialized Reference Number: 94926-1252

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

Races aren't won by aerodynamics or lightness alone: ​​it's speed that matters. And to achieve that, you have to create an uncompromising combination of aerodynamics, lightness, stiffness, and comfort. Our Ride Science team simulated races with real-world data and found the Tarmac SL8 to be the fastest road bike ever built on the biggest roads: 16.6 seconds faster over 40km, 128 seconds faster at Milano San Remo, and 20 seconds faster on the legendary Tourmalet climb.

The Tarmac SL8 Pro Shimano Ultegra Di2 delivers exceptional performance thanks to its full Shimano Ultegra Di2 12-speed groupset with power meter, tubeless-ready Roval Rapide CL III wheels, and integrated Roval Rapide cockpit. Ready to compete from the first moment.

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

Brakes

• FRONT BRAKE: Shimano Ultegra BR-R8170, hydraulic disc
• REAR BRAKE: Shimano Ultegra BR-R8170, hydraulic disc

Drivetrain

• GEAR CONTROLS: Shimano Ultegra R8170, hydraulic disc
• DRAWER: Shimano Ultegra Di2 R8150, solder type
• GEAR: Shimano Ultegra Di2 R8150, 12 speeds
• CASSETTE: Shimano Ultegra, 12 speeds, 11-30T
• CHAIN: Shimano XT M8100, 12 speeds with quick link
• CRANKS: Shimano Ultegra R8100, 52/36T, with potentiometer
• Bottom Bracket: Shimano BSA threaded

Wheels & Tires

• FRONT WHEEL: Roval Rapide CL III, Tubeless, 21mm internal carbon rim, 51mm depth, DT350 hub, 18h, DT Swiss Competition Race Straight Pull spokes
• REAR WHEEL: Roval Rapide CL III, Tubeless, 21mm internal carbon rim, 48.5mm depth, DT350 hub, 24h, DT Swiss Competition Race Straight Pull spokes
• FRONT TIRE: S-Works Turbo TLR Race, 700x28c
• REAR TIRE: S-Works Turbo TLR Race, 700x28c
• TUBES: Standard 700 x 20-28, Presta 80 valve mm

Cockpit

• HANDLEBAR: Roval Rapide Cockpit, integrated bar/stem
• TAPE: Supacaz Super Sticky Kush
• SADDLE: Body Geometry Power Pro Mirror, hollow titanium rails
• SEATPOST: S-Works Tarmac SL8 FACT Carbon, 15mm offset
• LOCKOUT: Tarmac Integrated Wedge

Accessories

• HEADSET: Roval Rapide Cockpit and SL7 stem spacer kit

Weight

• WEIGHT: 7.25 kg (size 56, with tubes) Standard)
• Weight limit: This bike has a maximum weight limit (bike + rider + cargo) of 125 kg.