Why buy your bike from Sigma Sports?
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.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
Whether it's winning the Tour de France or a city-limit sprint, the next generation of Tarmac—the SL4—was born to race, with head-snapping acceleration and razor-sharp handling. The Expert model has even higher stiffness-to-weight than last year's industry-leading SL3 frame, and features new Ui2 electronic shifting for immediate, spot-on shifting, plus DT Axis 4.0 wheels.
- Specialized SL4 FACT IS 10r carbon frame with uniquely shaped, tapered head tube and OSBB: now even stiffer and lighter for pure, unbridled speed and power
- Full monocoque FACT carbon fork with a tapered carbon steerer is super light with great torsional rigidity for high-speed handling
- Specialized Turbo Elite 100 TPI, offers BlackBelt protection for a tough tyre that still offers low rolling resistance, great traction, and light weight to allow for quick climps and fast descents
- Adjustable 4-position oversized alloy stem with carbon-clip front cone plus 31.8mm bar clamp for strength and versatile positioning
- FSA SL-K Light carbon BB30 crank is stiff and light for excellent power transfer
- 1-1/8" to 1-3/8" headset with sealed, Cr-Mo bearings ensures precision, low maintenance, and lighter weight; with 20mm of carbon spacers
- FACT carbon Comp seatpost absorb road vibrations and is stiff and efficient; paired with comfortable, high-performance BG Toupe Comp saddle with flat profile and Cr-Mo rails
Frame: Specialized FACT 10r carbon, FACT IS construction, tapered/shaped HT, compact race design, 1-3/8" lower bearing, OSBB
Fork: Specialized FACT carbon, full monocoque, OS race for 1-3/8" bearing
Bottom Bracket: OS integrated, sealed bearings
Brakes: Shimano Ultegra
Cassette: Shimano Tiagra, 10-speed, 11-28
Chain: Shimano Tiagra 10-speed
Chainset: FSA SL-K Light, carbon, BB30
Front Derailleur: Shimano Ultegra Di2
Handlebar Tape: Specialized Pro D2
Handlebar: Specialized Tarmac Expert, 2014 alloy
Headset: 1-1/8" upper and 1-3/8" lower Cr-Mo cartridge bearings, w/ 8mm carbon cone spacer and 20mm of carbon spacers
Pedals: Nylon flat test ride, loose ball, w/ reflectors
Rear Derailleur: Shimano Ultegra Di2
Saddle: BodyGeometry Toupé Comp, hollow Cr-Mo rails, 143mm
Seatpost: Specialized Comp, FACT carbon, 27.2mm
Seat Binder: Forged alloy, 32.6mm
Shifters: Shimano Ultegra Di2 STI
Stem: Specialized Comp-Set 6061 alloy, cone head bolt, 12-degree, 4-degree shim, 31.8mm
Tyres: Specialized Turbo Elite, BlackBelt, 100TPI, aramid bead, 700x23c
Tubes: Lightweight, presta
Wheels: DT Axis 4.0
Technical Specification
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.
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