Tarmac SL8 Pro Ultegra Di2 Road Bike 2026

Tarmac SL8 Pro Ultegra Di2 Road Bike 2026

104,24 £

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SpecializedTarmac SL8 Pro Ultegra Di2 Road Bike 2026

The Tarmac SL8Road Bikecombines aerodynamics, low weight, and ride quality once thought impossible. After eight generations and over two decades of development, it is more than the fastest Tarmac ever; it is the world’s fastest race bike.

Aerodynamics or lightweight alone do not win races; speed does. Achieving it demands a balance of aerodynamics, stiffness, compliance, and low weight. Race simulations using real-world data confirm the Tarmac SL8 is the fastest race bike on the courses that count, 16.6 seconds faster over 40km, 128 seconds quicker over Milan San Remo, and 20 seconds faster up the Tourmalet.

The Tarmac SL8 Pro comes with Shimano’s Ultegra Di2 groupset, offering lower weight, powerful braking, and precise shifting.

Tarmac Aero in Every Detail

Aerodynamics are focused where they matter most, at the leading edge. This makes the Tarmac SL8 the most aerodynamic road bike yet, faster even than the Venge. The new Speed Sniffer nose cone sharpens the head tube for lower drag, while a redesigned seat post, enabled by UCI rules, ensures cleaner airflow around the legs.

Specialized Minimum Weight, Maximum Aero

Drawing on lessons from the Aethos, the Tarmac SL8 hits the UCI minimum weight with a full aero setup. The S-Works frame weighs just 685 grams, 15 percent lighter than the SL7 and lighter than any other World Tour bike. Its efficient design reduces the need for extra stiffness layers.

Tarmac Ride Quality

With 33 percent better stiffness-to-weight than the SL7, the Tarmac SL8 takes handling, responsiveness, and race-proven geometry to the next level. It is stiffer at the pedals, sharper at the bars, yet more compliant in the saddle. Rider-First Engineering ensures consistent ride quality across all sizes, with 6 percent more compliance for smoother performance on rough roads. Geometry and 32mm tyre clearance remain identical to the SL7 for versatility.

Rider differences go beyond gender. Designing male and female-specific bikes is outdated. The Tarmac SL8 delivers top-level performance for every cyclist.

Specialized Race Ready Specification

The Tarmac SL8 Pro features a complete Shimano Ultegra Di2 groupset with Roval Rapide CL III tubeless-ready wheelset, and Roval Rapide Cockpit, ready to race straight from the box.

Technical Specification

Frame	Tarmac SL8 FACT 10r Carbon, Rider First Engineered, Win Tunnel Engineered, Clean Routing, threaded BB, 12×142 mm thru axle, flat mount disc
Fork	FACT 10r Carbon, 12×100 mm thru axle, flat mount disc
Front brake	Shimano Ultegra BR-R8170, hydraulic disc
Rear brake	Shimano Ultegra BR-R8170, hydraulic disc
Shift levers	Shimano Ultegra Di2 R8170, hydraulic disc
Rear derailleur	Shimano Ultegra Di2 R8150, 12 speed
Front derailleur	Shimano Ultegra Di2 R8150, braze-on
Crankset	Shimano Ultegra R81000, 52/36t
Cassette	Shimano Ultegra, 12 speed, 11-30t
Chain	Shimano XT M8100, 12 speed with quick link
Bottom bracket	Shimano Threaded BSA BB
Front wheel	Roval Rapide CL III, tubeless, 21 mm internal width carbon rim, 51 mm depth, Win Tunnel Engineered, DT350 hub, 18h, DT Swiss Competition Race Straight Pull Spokes
Rear wheel	Roval Rapide CL III, tubeless, 21 mm internal width carbon rim, 48.5 mm depth, Win Tunnel Engineered, DT350 hub, 24h, DT Swiss Competition Race Straight Pull Spokes
Front tyre	S-Works Turbo TLR Race Tyre, 700x28c
Rear tyre	S-Works Turbo TLR Race Tyre, 700x28c
Inner tubes	Standard 700×20-28 mm, 80 mm PV
Saddle	Power Pro Mirror, Hollow Ti Rails
Seatpost	S-Works Tarmac SL8 Carbon, FACT Carbon, 15 mm offset
Handlebars	Roval Rapide Cockpit, integrated bar/stem
Tape	Supacaz Super Sticky Kush
Seat binder	Tarmac integrated wedge
Headset	Stem headset spacers kit for SL7 stem & Roval Rapide cockpit use
Claimed Weight	7.25 kg (15 lb 15.7 oz)
Weight size	56

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.

If you require any assistance please contact our Customer Care team.