The Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike is the fastest race bike in the world, combining cutting-edge aerodynamics, ultra-lightweight carbon construction, and unmatched ride quality. After 20+ years and eight generations of refinement, the Tarmac SL8 sets a new benchmark in pro-level road racing performance, engineered to be faster, lighter, and more compliant than ever before.
Equipped with a Shimano Ultegra Di2 12-speed electronic groupset, integrated 4iiii dual-sided power meter, and the all-new Roval Rapide CL III carbon wheelset, this bike is designed to dominate everything from crits and stage races to epic endurance climbs.
World’s Fastest Road Bike
- Proven to be 16.6 seconds faster over 40km and 128 seconds faster over Milan-San Remo compared to the SL7
- Optimised using real-world race simulations by Specialized’s Ride Science team
Aero Innovation – Speed Sniffer Design
- All-new aero nose cone head tube reduces drag by reshaping airflow
- Narrowest and most aerodynamic seatpost Specialized has ever made
- Complies with updated UCI rules for maximum aero gains
Lightweight & Stiff Carbon Frame
- Ultra-light 685g carbon frame – 15% lighter than the SL7
- Rider-First Engineered™ geometry ensures consistent handling across all frame sizes
- 33% improved stiffness-to-weight ratio for more precise power transfer
Unrivalled Ride Quality
- 6% more compliant than SL7 for superior comfort on rough roads
- Proven race geometry with 32mm tyre clearance for versatility
- Perfect balance of stiffness, agility, and compliance for pro-level handling
Premium Build Kit
- Shimano Ultegra Di2 R8100 12-speed electronic shifting – fast, precise, and wireless
- Roval Rapide CL III tubeless-ready carbon wheels – aerodynamic, stable, and race-ready
- Integrated 4iiii power meter with Apple Find My technology for accurate data and extra security
- Roval Rapide aero cockpit for stiffness and sleek integration
The Tarmac SL8 Pro is perfect for road racers, competitive cyclists, and performance-focused riders who want the fastest carbon aero road bike with Shimano Ultegra Di2 and a power meter.
The Specialized Tarmac SL8 Pro Ultegra Di2 isn’t just a race bike, it’s the fastest, lightest, and most advanced road bike Specialized has ever made. With world-class aerodynamics, UCI-approved lightweight construction, and pro-level components, it delivers the ultimate performance advantage for competitive racers and serious enthusiasts alike.
