Specialized Tarmac SL8 Expert Shimano Ultegra Di2 2025
Nothing is faster than the Tarmac SL8. Built from a combination of aerodynamics, lightweight engineering, and exceptional ride quality, this is more than just the fastest Tarmac ever—it’s the world’s fastest race bike.
At Mackay Cycles, the Tarmac SL8 Expert is the go-to choice for riders chasing elite-level performance with proven real-world speed. Whether you're racing, training, or pushing your limits, this bike delivers uncompromising performance across every ride.
Through extensive race simulations, Specialized’s Ride Science team confirmed the SL8 is faster where it matters most—climbing, sprinting, and over long-distance efforts. It’s built to perform at the highest level.
Why you'll love it
- World’s fastest race bike with unmatched aero, weight, and stiffness balance
- FACT 10r carbon frame delivering exceptional responsiveness
- Shimano Ultegra Di2 12-speed electronic drivetrain for precise shifting
- Roval C38 carbon wheels – lightweight and tubeless ready
- Rider-First Engineered™ for consistent performance across all sizes
- Up to 32mm tyre clearance for added comfort and versatility
Performance Highlights
Aero in Everything
The SL8 features refined aerodynamic shaping including the Speed Sniffer nose cone, reducing drag and improving real-world speed.
Minimum Weight, Maximum Speed
With a 685g frame, it’s significantly lighter than previous generations while maintaining stiffness and aero efficiency.
Ride Quality Meets Race Performance
Increased compliance and stiffness-to-weight improvements deliver confident handling and comfort on longer rides.
Beyond Gender Design
Designed for all riders, focusing on performance data rather than outdated gender categories.
Specifications
| Frame |
Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered |
| Fork |
FACT 10r Carbon, 12x100mm thru-axle |
| Drivetrain |
Shimano Ultegra Di2 R8150, 12-speed |
| Crankset |
Shimano Ultegra R8100, 52/36T |
| Cassette |
Shimano Ultegra 12-speed, 11-30T |
| Brakes |
Shimano Ultegra Di2 hydraulic disc |
| Wheelset |
Roval C38 carbon, tubeless ready |
| Tires |
S-Works Turbo 700x26mm |
| Saddle |
Body Geometry Power Expert |
| Seatpost |
S-Works Tarmac SL8 Carbon |
| Handlebars |
Specialized Expert Shallow Drop alloy |
| Weight |
Approx. 7.20kg (Size 56) |
Specialized Tarmac SL8 Expert Road Bike Shimano Ultegra Di2 Carbon Road Bike Mackay Cycles Road Racing Bike Lightweight Aero Road Bike Australia Queensland Mackay Bicycle Shop Road Bikes Performance Bikes Bicycle Superstore MyRide
Sporting Goods > Outdoor Recreation > Cycling > Bicycles > Road Bikes
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