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Specialized S-Works Tarmac SL6 Dura-Ace Di2 Road Bike 2019

★★★★★ ★★★★★
MSP £9,150.00 Save 24%

From only £217.89 per month

15.9% APR Representative. T&Cs Apply.

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Product ID: 905874

Building on the already renowned Tarmac, Specialized have released the S-Works Tarmac SL6 Dura-Ace Di2 Road Bike; stiffer, more compliant and highly versatile.

The frame weight has been reduced by almost 200 grams, and the Rider-First Engineered™ technology improved for a more responsive ride and excellent power transfer. Shimano's Dura-Ace Di2 groupset provides precise and instant shifting and powerful braking, while the inclusion of S-Works Power Cranks allow you to train more efficiently. Roval CLX 50 carbon wheels, developed in the Win Tunnel, are aerodynamics, stiff and light, and combined with fast rolling Specialized Turbo Cotton tyres. This Tarmac is a performance race machine, ready for all you throw at it.

Why buy your bike from Sigma Sports?

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Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.

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Built, Checked, Tuned and Tested

All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.

Free Bike Delivery

We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.

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Free 30-Day Bike Insurance

We've partnered with PedalSure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.

Specialized S-Works Tarmac SL6 Dura-Ace Di2 Road Bike 2019

Continually looking to improve on what may, to many, appear to be near perfect, Specialized have released the S-Works Tarmac SL6 Dura-Ace Di2 Road Bike; developed to be even faster, in all conditions. FACT 12r carbon fibre is the most advanced material available, revolutionary in its construction and layup, and takes an outstanding almost 200 grams off the frame weight.

Rider-First Engineered™ technology has been improved for even more stiffness and compliance, exactly where it's needed. Weight is reduced, and, as before, these benefits are seen equally across every frame size. The geometry has had an update and is based on countless Retül data points as well as input from professional riders, so you get a Performance Road Geometry that is responsive and transfers power exceptionally efficiently.

Although this is not categorised as an aero road bike, aerodynamics have still been a serious consideration. Nothing has been taken from the Tarmac design; however, areas of the bike have been adapted to reduce drag, essentially providing 'aero for free'. A new fork shape, dropped seatstays with aero tubes and a D-shaped seatpost and seat tube all result in this bike being around 45 seconds quicker over 40km compared to other bikes in its category.

Just as important is the quality of the ride, and the seatpost has had compliance built into the top 120mm. In addition, the seatstays have been dropped and the seat tube shape altered. Tyre clearance up to 30mm adds comfort to your ride, and these adaptations mean this bike is truly race-ready, yet will still be enjoyable to ride, no matter the distance or terrain.

The Tarmac frameset has been specced to the highest level, and includes Shimano's flagship Dura-Ace Di2 groupset. Shifting is crisp, reliable and precise, at just the light touch of the lever. Direct mount brakes offer modulated and powerful braking, so you can take fast descents at speed, in full confidence. A lightweight S-Works Power Cranks power meter is fitted to provide accurate and reliable dual-sided measurement of your watts so that you can take your training up a notch.

Finished with a Roval CLX 50 carbon wheelset, engineered in Specialized's Win Tunnel, you can be sure of superior aerodynamics, strength and stiffness.


  • Featuring Specialized's Rider-First Engineered™ design that ensures every frame size has the same legendary climbing responsiveness and descending prowess you'd expect from a Tarmac. The S-Works FACT 12r frame is their highest quality carbon frame, offering the ideal blend of overall light weight and targeted stiffness
  • Shimano's Dura-Ace Di2 group provides exceptionally crisp shifts and keeps the total weight of the Tarmac to an absolute minimum
  • The Win Tunnel Engineered Roval CLX 50 carbon wheelset offers superior aerodynamics and plenty of durability to be both a perfect training and race wheelset

Technical Specification

FRAME Specialized S-Works Tarmac SL6, FACT 12r carbon, Rider-First Engineered™, OSBB, clean routing, internally integrated seat clamp, 130mm rear spacing, direct-mount rim brake
FORK Specialized S-Works FACT 12r carbon, direct-mount rim brake
BOTTOM BRACKET OSBB, CeramicSpeed bearings
STEM Specialized S-Works SL, alloy, titanium bolts, 6-degree rise
HANDLEBAR Specialized S-Works Shallow Bend Carbon, 125mm drop x 75 mm reach
FRONT BRAKE Shimano Dura-Ace R9110-F, direct-mount
REAR BRAKE Shimano Dura-Ace R9110-RS, direct-mount
FRONT DERAILLEUR Shimano Dura-Ace Di2 R9150, braze-on
REAR DERAILLEUR Shimano Dura-Ace Di2 R9150, 11-speed
SHIFT LEVERS Shimano Dura-Ace Di2 9150
CHAIN Shimano Dura-Ace, 11-speed
CASSETTE Shimano Dura-Ace R9100, 11-speed, 11-30t
CRANKSET S-Works Power Cranks, dual-sided power measurement, +/- 1.5% accuracy
FRONT WHEEL Roval CLX 50, Win Tunnel Engineered, carbon rim, 50mm depth, CeramicSpeed bearings, 16h
REAR WHEEL Roval CLX 50, Win Tunnel Engineered, carbon rim, 50mm depth, DT Swiss 240 internals, CeramicSpeed bearings, 21h
FRONT TYRE Specialized Turbo Cotton, 320 TPI, 700x26mm
REAR TYRE Specialized Turbo Cotton, 320 TPI, 700x26mm
SADDLE Specialized S-Works Toupé, Body Geometry shape, 143mm width, carbon rails
SEATPOST Specialized S-Works FACT Carbon Tarmac seatpost, 20mm offset
SEAT BINDER Tarmac SL6 clamp assembly

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 specified), 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.

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.

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