The Specialized Tarmac SL8 Pro UDi2 is engineered for unparalleled speed, aerodynamics, and handling, making it the fastest race bike ever created. With a lightweight FACT 10r carbon frame, cutting-edge aerodynamics, and the Shimano Ultegra Di2 12-speed electronic drivetrain, the SL8 Pro delivers race-winning performance with precision shifting and superior comfort.
After eight generations and over two decades of development, this bike is 16.6 seconds faster over 40km, 128 seconds faster over Milan-San Remo, and 20 seconds faster over the Tourmalet climb.
Aerodynamics Where It Matters
✅ Speed Sniffer Nose Cone – The newly redesigned head tube shape minimizes drag, maximizing aerodynamic gains.
✅ Narrowest, most aerodynamic seatpost ever – Optimized airflow for improved efficiency and reduced turbulence.
✅ UCI rule-optimized design – Developed for maximum speed in real-world race conditions.
Ultra-Lightweight & Aero-Optimized
✅ 685g frame – 15% lighter than the SL7, setting a new benchmark for lightweight aero bikes.
✅ Inspired by Aethos – Optimized tube shapes ensure maximum stiffness without unnecessary material.
✅ 32mm tire clearance – Allows for higher-volume tires, improving comfort and control without sacrificing speed.
Unmatched Stiffness, Control & Comfort
✅ 33% better stiffness-to-weight ratio – Delivers explosive power transfer and razor-sharp handling.
✅ 6% more compliance – Absorbs road imperfections for a smoother ride.
✅ Rider-First Engineering™ – Ensures consistent ride quality across all frame sizes.
Beyond Gender – Engineered for Every Rider
Rather than designing separate male and female models, the Tarmac SL8 is optimized for all cyclists, ensuring optimal fit, aerodynamics, and performance for every rider.
Premium Components for Race-Ready Performance
Shimano Ultegra Di2 12-speed drivetrain – Wireless electronic shifting with integrated power meter.
Roval Rapide CL II wheelset – Lightweight, tubeless-ready, and aerodynamically optimized.
Roval Rapide Handlebar with SL7 stem – Perfect balance of comfort, aerodynamics, and race geometry.
Why choose this bike?
FACT 10r carbon frame – Lightweight, stiff, and aerodynamically refined.
Speed Sniffer Nose Cone – Advanced head tube design to minimize drag.
Shimano Ultegra Di2 12-speed – Wireless precision shifting with power meter.
Roval Rapide CL II wheels – Fast, lightweight, and tubeless-ready.
Rider-First Engineering™ – Ensures identical ride quality for all riders.
Key Features
Frame: FACT 10r carbon, aerodynamic shaping, 685g frame weight.
Drivetrain: Shimano Ultegra Di2 12-speed, power meter-equipped.
Brakes: Shimano Ultegra hydraulic disc brakes.
Wheels: Roval Rapide CL II, tubeless-ready.
Cockpit: Roval Rapide Handlebar with SL7 stem.
Who is this bike for?
The Specialized Tarmac SL8 Pro UDi2 is designed for performance-driven road cyclists, competitive racers, and riders seeking top-tier aerodynamics at a more accessible price. Whether attacking climbs, sprinting for the finish, or chasing PRs, this bike delivers world-class speed, precision, and efficiency.
Brand |
Specialized
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Weight |
7.16 kg (15 lb, 12.6 oz)
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Accessories/Pedals |
PEDAL, TEST RIDE PEDALS PROVIDED BY SPECIALIZED
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Frameset/Frame |
Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
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Wheels/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
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Wheels/Rear tire |
S-Works Turbo, 2BR, 700x26mm
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Wheels/Inner tubes |
Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve
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Wheels/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
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Wheels/Front tire |
S-Works Turbo, 2BR, 700x26mm
|
Suspension/Fork |
FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
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Frameset/Seat binder |
Tarmac integrated wedge
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Frameset/Headset |
STEM HEADSET SPACERS KIT FOR SL7 STEM & ROVAL RAPIDE COCKPIT USE
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Drivertain/Shift levers |
Shimano Ultegra Di2 R8170, hydraulic disc
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Drivertain/Rear derailleur |
Shimano Ultegra Di2 R8150, 12-speed
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Drivertain/Front derailleur |
Shimano Ultegra Di2 R8150, braze-on
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Drivertain/Crankset |
Shimano Ultegra R8100 with 4iiii power meter
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Drivertain/Chainrings |
52/36T
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Drivertain/Chain |
Shimano Ultegra, 12-speed
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Drivertain/Cassette |
Shimano Ultegra, 12-speed, 11-30t
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Cockpit/Tape |
Supacaz Super Sticky Kush
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Cockpit/Stem |
Tarmac integrated stem, 6-degree
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Cockpit/Seatpost |
S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
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Cockpit/Saddle |
SADDLE,NOVATION, KPPM155HR-BK, POWER PRO MIRROR, ETPU41 LATTICE, NYLON RECYCLE CF BASE, HOLLOW-TI RAIL,155MM;SADDLE,NOVATION, KPPM143HR-BK, POWER PRO MIRROR, ETPU41 LATTICE, NYLON RECYCLE CF BASE, HOLLOW-TI RAIL,143MM
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Cockpit/Handlebars |
HDLBR,ROAD,IBS E2.1,CRBN;FS
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Brakes/Rear brake |
Shimano Ultegra Di2 R8170, hydraulic disc
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Brakes/Front brake |
Shimano Ultegra Di2 R8170, hydraulic disc
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