Specialized S-Works Tarmac Disc - Dura Ace Di2 2020

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The Tarmac SL6 was our 2017 Bike of the Year:

It's a bike that can truly do it all - light, stiff, aero, rides well and handles like a dream... it's universally regarded that Specialized have absolutely knocked it out of the park with this bike.

As soon as I tested it (and started devising ways to delay its return) it was clear that this was the most impressive bike I had ridden in 2017.

Now Specialized have brought out the eagerly awaited Disc version, and it retains all the virtues of the rim-brake model whilst adding the performance (and reassurance) of disc brakes.

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Colour: Satin Carbon/Tarmac Black/Clean

Out of stock

Bespoke Boss Barry wanted to really put the SL6 Disc through its paces. Where better than the French Pyrenees? Fast, twisty descents, mixed weather conditions, this is a real test for any bike.

Read how he got on on the Bespoke blog.

It rides just like the rim-brake version, which is undoubtedly a good thing. There's maybe a touch less reaction when climbing out of saddle but I could be imagining it.

But the other benefits are so obvious... and it has a Powermeter built in! I know the asking price sounds like a lot; but there is nothing you need to change on this bike.


  • Frame: S-Works Tarmac SL6, FACT 12r carbon fiber, Rider-First Engineeredâ„¢, OSBB, clean routing, internally integrated seat clamp, 12x142mm thru-axle, flat-mount disc
  • Fork: S-Works FACT 12r carbon, 12x100mm thru-axle, flat-mount disc
  • Front Wheel: Roval CLX 50 Disc, carbon, tubeless-ready, Win Tunnel Engineered, 50mm depth, CeramicSpeed bearings, 21h
  • Rear Wheel: Roval CLX 50 Disc, carbon, tubeless-ready, Win Tunnel Engineered, 50mm depth, DT Swiss 240 internals, CeramicSpeed bearings, 24h
  • Tyres: Turbo Cotton, 320 TPI, 700x26mm
  • Crankset: S-Works Power Cranks, dual-sided power measurement, +/- 1.5% accuracy
  • Chainrings: 52/36T
  • Bottom Bracket: OSBB, CeramicSpeed bearings
  • Shift Levers: Shimano Dura-Ace Di2 Disc R9170
  • Front Mech: Shimano Dura-Ace Di2 R9150, braze-on
  • Rear Mech: Shimano Dura-Ace Di2 R9150, 11-speed
  • Cassette: Shimano Dura-Ace R9100, 11-speed, 11-30t
  • Chain: Shimano Dura-Ace, 11-speed
  • Brakes: Shimano Dura-Ace R9170, hydraulic disc
  • Handlebars: S-Works Short & Shallow
  • Stem: S-Works SL, alloy, titanium bolts, 6-degree rise
  • Saddle: Body Geometry S-Works Power, carbon fibre rails, carbon fibre base
  • Seatpost: S-Works FACT carbon Tarmac seatpost, 20mm offset
  • Seat Binder: Tarmac SL6 clamp assembly