Specialized S-Works Tarmac SL8 – Shimano Dura-Ace Di2 Road Bike 2025 in Gloss Solidity/Red To Black/White

Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. After eight generations and over two decades of development, it’s more than the fastest Tarmac ever – it’s the world’s fastest race bike. Your legs up for it?

Tarmac SL8 took learnings from Aethos to be easily built at the UCI minimum with a full aero set up. The team delivered a mind-bending, scale tickling 685 gram frame – 15% lighter than the Tarmac SL7 and lighter than anything on else on the World Tour*. With the ability to make lightweight a top priority in the down tube, seat tube, and rear of the bike lessons from Aethos were applied. The frame’s shape carries load so efficiently that extra carbon stiffness layers become redundant. *Unless of course you count the time Kasper Asgreen raced the 585-gram Aethos frame during a Tour stage.

Key Features & Benefits

• Aero in everything:Utilizing new UCI rules, the Tarmac SL8 has the narrowest, most aero seat post Specialized have ever made ensuring fast-moving, dirty air around the legs can flow back more cleanly.
• Massive gains in stiffness-to-weight:The bike is stiffer at the pedals, more precise at the bars, and combines it with a compliant ride in the saddle that sets a new benchmark for race bike comfort.
• Shimano Dura-Ace 9200 series Di2 groupsetset:Exceptional shifting the perfect complement to the world’s fastest frame.

Full Specification

• Frame:Tarmac SL8 FACT 12r Carbon, Rider First EngineeredTM, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
• Fork:S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc
• Number of Gears:24
• Gear Shifters:Shimano Dura-Ace R9270, hydraulic disc
• Chainset:Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision 3+ Pro dual-sided powermeter
• Chainrings:52/36T
• Rear Cassette:Shimano Dura-Ace, 12-speed, 11-30t
• Chain:Shimano Dura-Ace, 12-speed
• Front Derailleur:Shimano Dura-Ace R9250, braze-on
• Rear Derailleur:Shimano Dura-Ace R9250, 12-speed
• Bottom Bracket:Shimano Dura-Ace, BB-R9200
• Pedals:Not supplied:Shop pedals here
• Front Wheel:Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, Roval AFD hub, 18h, DT Swiss Aerolite spokes
• Rear Wheel:Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, Roval AFD hub, 18h, DT Swiss Aerolite spokes
• Front Tyre:S-Works Turbo Rapidair 2BR, 700x26mm
• Rear Tyre:S-Works Turbo Rapidair 2BR, 700x26mm
• Brakes:Shimano Dura-Ace R9270, hydraulic disc
• Handlebars:Roval Rapide Cockpit, Integrated Bar/Stem
• Handlebar Tape:Supacaz Super Sticky Kush
• Headset:No info available
• Stem:Roval Rapide Cockpit, Integrated Bar/Stem
• Saddle:Body Geometry S-Works Power with Mirror, carbon fibre rails, carbon fibre base
• Seatpost:S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
• Accessories:.
• Weight:56cm – 6.62 kg (14 lb, 9.5 oz)