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Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike – Lightweight Aero Performance
Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike – Lightweight Aero Performance
Specialized

2026 Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike - Gloss Obsidian

£5,499.00
I'm a Pre-launch Product. Find out more
Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

2026 Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike - Gloss Obsidian

Season:2026

Brand:Specialized

Code:42215775460174

The Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike is engineered for speed, precision, and race-winning performance. With a perfect combination of aerodynamics, lightweight carbon frame, stiffness, and compliance, the SL8 Expert is the ultimate high-performance road bike for competitive cyclists, endurance riders, and anyone seeking pro-level race bike performance.

After eight generations and more than two decades of innovation, the Tarmac SL8 is more than just the fastest Tarmac ever, it’s a world-class aero road bike built to excel on climbs, sprints, and iconic race routes.

  • Pro-Level Carbon Frame: Lightweight 685g Tarmac SL8 carbon frame, engineered using Rider-First Technology for consistent ride quality across all sizes.
  • Aerodynamic Race Geometry: Featuring the Speed Sniffer nose cone and Specialized’s most aerodynamic seatpost ever for reduced drag and maximum speed.
  • Ultegra Di2 Electronic Groupset: Smooth, precise shifting with Shimano Ultegra Di2, perfect for competitive racing or fast group rides.
  • C38 Carbon Tubeless-Ready Wheels: Lightweight, aerodynamic wheelset compatible with tubeless tyres for improved speed, traction, and comfort.
  • SL7 Stem & Expert Shallow Drop Alloy Handlebars: Balanced handling, precise steering, and race-ready control.
  • Stiffness-to-Weight Optimisation: 33% improvement over the SL7, providing explosive power transfer and responsive handling.
  • Compliant Ride for Comfort: 6% more saddle compliance than SL7, smoothing rough roads without compromising race geometry.
  • Versatile Tyre Clearance: 32mm tyre capacity for comfort and adaptability on varying road conditions.
  • Beyond Gender Design: Optimised for all riders regardless of gender, ensuring world-class ride quality for every cyclist.

Performance Highlights

  • Fastest Race Bike on Key Routes: 16.6 seconds faster over 40km, 128 seconds faster across Milan-San Remo, and 20 seconds quicker on the Tourmalet climb.
  • Aerodynamic Efficiency: Leading-edge aero features for maximum speed on flats, descents, and technical sections.
  • Lightweight, World Tour-Proven Design: Lessons from the Aethos frame applied to reduce weight without sacrificing stiffness or handling.

The Specialized Tarmac SL8 Expert Ultegra Di2 Road Bike is the ultimate carbon race bike for performance-driven cyclists. Built with precision, speed, and comfort in mind, this high-end aero road bike is ready to dominate training rides, gran fondos, and professional racing.

The Specialized Tarmac SL8 Expert Ultegra Di2 is a lightweight carbon aero road bike, Ultegra Di2 electronic drivetrain, C38 tubeless wheels, Rider-First engineered, world-class race geometry.

Technical Information
  • Frame
    Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
  • Fork
    FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
  • Handlebars
    Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach
  • Saddle
    Body Geometry Power Expert
  • Stem
    Tarmac integrated stem, 6-degree
  • Tape
    Supacaz Super Sticky Kush
  • Seatpost
    S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
  • Seat Binder
    Tarmac integrated wedge
  • Front Brake
    Shimano Ultegra Hydraulic Brake
  • Rear Brake
    Shimano Ultegra Hydraulic Brake
  • Shift Levers
    Shimano Ultegra R8170, hydraulic disc
  • Front Derailleur
    Shimano Ultegra R8150, braze-on
  • Rear Derailleur
    Shimano Ultegra Di2 R8150, 12-speed
  • Cassette
    Shimano Ultegra, 12-speed, 11-30t
  • Crankset
    Shimano Ultegra R81000
  • Bottom Bracket
    Shimano Threaded BSA BB
  • Chain
    Shimano XT M8100, 12-speed w/ quick link
  • Front Wheel
    Roval C38, 21mm internal width carbon rim
  • Rear Wheel
    Roval C38, 21mm internal width carbon rim
  • Front Tyre
    S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Rear Tire
    S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
  • Inner Tubes
    Turbo Ultralight, 48mm Presta valve
  • Headset
    Stem headset spacers kit for SL7 stem & Roval Rapide cockpit use
  • Weight
    7.18kg (15 lb, 13.3 oz)
  • Weight Size
    56cm
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying. Please note that this bike does not come with pedals.
Sizing Information
Size in ft4'8" - 5'1"5'1" - 5'4"5'4" - 5'7"5'7" - 5'9"5'9" - 5'11"5'11" - 6'2"6'2" - 6'5"
Size in cm142 - 155cm155 - 163cm163 - 170cm170 - 175cm175 - 180cm180 - 188cm188 - 196cm
Bike Size44495254565861

GEOMETRY

Size44cm49cm52cm54cm56cm58cm61cm
BB Drop74mm74mm74mm72mm72mm72mm72mm
BB Height266mm266mm266mm268mm268mm268mm268mm
Bike Standover Height723mm735mm746mm768mm786mm808mm834mm
Chainstay Length410mm410mm410mm410mm410mm410mm410mm
Fork Length, Full370mm370mm370mm370mm370mm370mm370mm
Fork Rake/Offset47mm47mm47mm44mm44mm44mm44mm
Front Centre572mm574mm577mm579mm592mm606mm613mm
Head Tube Angle70.5°71.75°72.5°73°73.5°73.5°74°
Head Tube Length99mm109mm120mm137mm157mm184mm204mm
Frame Reach366mm375mm380mm384mm395mm402mm408mm
Seat Tube Angle75.5°75.5°74°74°73.5°73.5°73°
Seat Tube Length433mm445mm456mm473mm494mm515mm545mm
Frame Stack501mm514mm527mm544mm565mm591mm612mm
Top Tube Length, Horizontal496mm509mm531mm541mm563mm577mm595mm
Trail71mm63mm58mm58mm55mm55mm52mm
Wheelbase970mm973mm975mm978mm991mm1006mm1013mm
Stack to Stem509mm522mm535mm552mm573mm599mm620mm
Reach to Stem363mm372mm377mm381mm393mm400mm406mm
Crank Length165mm165mm170mm172.5mm172.5mm175mm175mm
Handlebar Width360mm380mm400mm420mm420mm440mm440mm
Stem Length70mm80mm90mm100mm100mm110mm110mm
Saddle Width155mm155mm155mm143mm143mm143mm143mm
Seatpost Length300mm300mm300mm380mm380mm380mm380mm
Professional Opinion
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