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

★★★★★ ★★★★★
MSP £9,500.00 Save 21%

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Product ID: 870778

Designed for road racing, undulating endurance rides and anything in-between, the Specialized S-Works Tarmac SL6 Disc Road Bike is a versatile machine, perfect for those chasing single bike simplicity.

Featuring a Shimano Dura-Ace Di2 Groupset, Roval CLX 50 Wheels and a full FACT 12r carbon fibre construction, this lightweight offering has the performance to match its slick aesthetics. Utilising Rider-First Engineered technology and an intuitive profile, the SL6 Disc offers consistent performance between sizes and boasts identical aerodynamic efficiency and stiffness to its non disc counterpart.

Why buy your bike from Sigma Sports?

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Expert Advice

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 Disc Dura-Ace Di2 Road Bike

The Specialized S-Works Tarmac SL6 Disc Road Bike takes all the benefits of the non disc model, and tweaks the design to offer enhanced braking and control in varied conditions. Featuring a Shimano Dura-Ace Di2 Groupset, Roval CLX 50 Wheels and a premium carbon fibre construction, the SL6 is suitable for anything from criterium racing through to challenging alpine adventures.

Constructed from FACT 12r carbon fibre, this lightweight bike offers high levels of stiffness for a direct ride, while the front and rear bolt-thru axle design further improves control. Featuring Rider-First Engineering, Specialized are able to ensure consistent performance across all sizes, whilst allowing adequate clearance for tyres up to 30mm wide. Following five years of rigorous development, the new disc model also offers identical levels of stiffness and aerodynamic efficiency to the highly-regarded rim brake variant, ensuring there are no drawbacks to the use of discs.

The Dura-Ace Di2 Groupset offers the slick, reliable shifting expected from Shimano's premium 11-speed offering, while the matching 9170 Hydraulic Disc Brakes ensure exceptional stopping power and modulation in all weather conditions. Combining an 11-30T cassette with the 52/36T Dura-Ace Chainset, the gear range is broad enough for spinning up steep ascents and sprinting along the flats with equal efficiency.

Improving the already fantastic specification, Specialized have fitted their S-Works Power Cranks as standard. With dual-sided power measurement accurate to +/-1%, these lightweight cranks enhance training by allowing the rider to monitor and analyse their performances. Compatible with ANT+ and Bluetooth devices, you can track your power output on the fly, and with an overall weight of just 440 grams in their 172.5mm size, they offer no significant weight penalty.

Completed with a pair of Roval CLX 50 Wheels and Specialized Turbo Cotton Tyres, the SL6's versatility is further increased. Featuring a semi-deep 50mm profile, the CLX's balance crosswind stability and aerodynamics perfectly, while the CeramicSpeed Bearings ensure reliable, smooth performance all year round. Additionally, with their 26mm width, the Specialized Turbo Cotton Tyres reduce rolling resistance and enhance grip and comfort for a confidence inspiring no matter the route ahead.


  • FACT 12r carbon fibre construction reduces weight and boosts stiffness
  • Shimano Dura-Ace Di2 9170 Groupset offers slick, reliable performance
  • 11-30T cassette ensures efficient climbing
  • 26mm Specialized Turbo Cotton Tyres ensure comfort and control on unpredictable terrain
  • Bolt thru-axle design offers direct handling
  • Rider-First Engineered technology provides consistent performance between sizes
  • Equal stiffness and aerodynamic efficiency as the rim brake version
  • Aerodynamic frame profile reduces drag
  • Roval CLX 50 Wheelset balance crosswind stability with aerodynamics

Technical Specification

FRAME Specialized S-Works FACT 12r carbon fibre, OSCBB, clean routing, internally integrated seat clamp, 12x142mm thru-axle, flat mount disc brake
FORK Specialized S-Works FACT carbon, 12x100mm thru axle
STEM Specialized S-Works SL, alloy, titanium bolts, 6-degree rise
HANDLEBARS Specialized S-Works SL Carbon Shallow Drop, 125x75mm
FRONT BRAKE Shimano Dura-Ace Di2 9170, hydraulic disc
REAR BRAKE Shimano Dura-Ace Di2 9170, hydraulic disc
FRONT DERAILLEUR Shimano Dura-Ace Di2 9150, braze-on
REAR DERAILLEUR Shimano Dura-Ace Di2 9150, 11-speed
SHIFT LEVERS Shimano Dura-Ace Di2, Disc, 9170
CASSETTE Shimano Dura-Ace 9100, 11-speed, 11-30T
CRANKSET Specialized S-Works Power Cranks, dual-sided power measurement, +/-1% accuracy
BOTTOM BRACKET OSBB, CeramicSpeed Bearings
FRONT WHEEL Roval CLX 50 Disc, carbon, tubeless ready, 50mm deep, CeramicSpeed Bearings
REAR WHEEL Roval CLX 50 Disc, carbon, tubeless ready, 50mm deep, CeramicSpeed Bearings
FRONT TYRE Specialized Turbo Cotton, 700x26mm, clincher
REAR TYRE Specialized Turbo Cotton, 700x26mm, clincher
SADDLE Specialized S-Works Toupe, 143mm, carbon rails
SEATPOST Specialized S-Works FACT carbon, 20mm offset

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.

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.

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