2025 Specialized S-Works Tarmac SL8 Shimano Dura-Ace Di2 Road Bike
Finance available with Novuna Personal Finance
Save with Cycle to Work
At Cycles UK we accept all major cycle to work scheme vouchers online and instore. Just enter your certificate details during checkout.
The 2025 Specialized S-Works Tarmac SL8 Shimano Dura-Ace Di2 Road Bike 54 Gloss Solidity / Red To Black Pearl / Metallic White Silver is available at the following locations.
The item will be transferred to the location you choose during checkout.
If the item is not currently available to view at your desired location, please call your nearest store to arrange for it to be transferred.
The 2025 Specialized S-Works Tarmac SL8 Shimano Dura-Ace Di2 Road Bike is the fastest Tarmac ever thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible.
Aerodynamics or lightweight alone don’t win races, speed is what matters. Delivering that speed requires creating an uncompromising combination of aerodynamics, lightweight, stiffness, and compliance. Through race simulations using real world data Specialized's Ride Science team knows the Tarmac SL8 is the fastest race bike ever made on the routes that matter. It's 16.6 seconds faster over 40km, 128 seconds faster over Milan San Remo, 20 seconds faster over the legendary Tourmalet climb.
Utilizing new UCI rules, the Tarmac SL8 has the narrowest, most aero seat post we’ve ever made ensuring fast moving, dirty air around the legs can flow back more cleanly. Tarmac SL8 took learnings from Aethos to be easily built at the UCI minimum with a full aero set up - 15% lighter than the Tarmac SL7. The bike is stiffer at the pedals, more precise at the bars, and combines it with a compliant ride in the saddle that sets a new benchmark for race bike comfort.
The S-Works Tarmac SL8 comes with only the best components. A full Shimano Dura-Ace 9200 series Di2 groupset with dual-sided power meter, and a Roval Rapide CLX II tubeless-ready wheelset is the perfect complement to the world’s fastest frame. All S-Works Tarmac SL8 models ship with a Roval Rapide cockpit to save weight and for the fastest possible leading edge.
This bike is perfect for
Road racers who need pro level performance. With the Tarmac SL 8 you get all the latest aero tech, power meter, and electronic gearing all wrapped up in a lightweight package.
Key Features
- Lightweight and aerodynamic carbon frame
- Shimano Dura-Ace Di2 12 Speed gearing
- Roval Rapide CLX II carbon wheels
- 4iiii Precision 3+ Pro dual-sided powermeter
If you are buying a road bike one of the big differences between models will be which gears they use. Most manufacturers will make the same bike, using the same frame but putting different gears and wheels on it. So for instance you can buy a Trek Domane AL 2 Disc with Shimano Claris gearing for £975 or get the Trek Domane AL 4 Disc with Tiagra gearing for £1625. They are fundamentally the same bike. One comes with the Shimano Tiagra gears and the other comes with Shimano Claris gears.
In most cases, the bottom of the range gears and top of the range gears will basically work in the same way. The big differences are in the quality of material used and the weight. Top of the range gears will be lighter and smoother to use.
One thing to watch out for when comparing bikes is whether the full groupset is being used. If you are buying a bike that has Shimano 105 gears on it. Shimano makes 105 brakes, gear levers, front and rear derailleurs, cranks, chainrings and bottom brackets. So basically all of the running gear on the bike. Some bike manufacturers will fit the full groupset, others will fit Shimano 105 front and rear derailleurs but use their own brakes and cranks to save a few pounds. So if you are comparing bikes be sure to check how much of the groupset the bike actually uses.
Read our Guide to Road Bike Gears
Road Bike Buying Guide
Nothing beats the feeling of effortless speed you get on a road bike. There are lots of reasons to ride a road bike, from the simple joy of it, to racing, long distance challenges, or café rides with friends. Whatever you want to do there will be road bike out there for you.
Men’s and Women’s road bikes
Nearly all manufacturers have stopped making dedicated men’s and women’s bikes. They are now all unisex. What you will see is that on smaller bikes, brands will often fit a wider saddle (generally more female friendly). On larger bikes they will often fit a narrower one (generally more male friendly).
Disc or rim brakes
It is getting increasingly hard to buy new bikes with rim brakes as the industry has almost exclusively switched to discs. The reasons for this are pretty simple. Disc brakes are much, much, more powerful than old rim brake systems so you can stop a lot more easily and safely. Disc brakes also allow much bigger tyres to be fitted which is more comfortable. Older disc brake systems did often suffer from rubbing and squeaking. While this hasn’t been completely fixed yet it is much less common on modern bikes with hydraulic brakes. Mechanical disc brakes can still take a bit of fettling to get them right so go for hydraulic if you can.
Read our full road bike buying guide
Who are Specialized?
Specialized is one of the best-known quality bike brands in the world. Started by a group of riders in 1974. A fact which has guided their decision making ever since.
" Made for riders, by riders."
They strove to make the best quality tires when quality tyres weren't around. When people wanted to ride cruisers in the dirt, they made the first production mountain bike. When roadies wanted to go faster, Specialized doubled down on carbon and built their own wind tunnel.
Bikes like the Allez, Rockhopper and Stumpjumper have developed followings and reputations of their own. Specialized has a reputation for making high-end, high-quality bikes. Specialized bikes always look great with high-quality paint and sensible sizing hel0s you get the right bike each time. If you buy a Specialized bike you can be guaranteed it will do what it is supposed to and will last.
Find our more about Specialized bikes
Price Match at Cycles uk
We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.
| Frame | S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc |
| Fork | S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc |
| Crankset | Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision 3+ Pro dual-sided powermeter |
| Chain | Shimano Dura-Ace, 12-speed |
| Cassette | Shimano Dura-Ace, 12-speed, 11-30t |
| Shift Levers | Shimano Dura-Ace R9270, hydraulic disc |
| Front Derailleur | Shimano Dura-Ace R9250, braze-on |
| Rear Derailleur | Shimano Dura-Ace R9250, 12-speed |
| Front Brake | Shimano Dura-Ace R9270, hydraulic disc 160mm rotor |
| Rear Brake | Shimano Dura-Ace R9270, hydraulic disc 140mm rotor |
| Front Wheel | Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, Roval AFD hub, 18h, DT Swiss Aerolite spokes |
| Rear Wheel | Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 60mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes |
| Front Tyre | S-Works Turbo Rapidair 2BR, 700x26mm |
| Rear Tyre | S-Works Turbo Rapidair 2BR, 700x26mm |
| Handlebars | Roval Rapide Cockpit, Integrated Bar/Stem |
| Saddle | Body Geometry S-Works Power with Mirror, carbon fiber rails, carbon fiber base |
| Seat Post | S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset |
| Seat Binder | Tarmac integrated wedge |
| Inner Tubes | Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve |
| Chain Rings | 52/36T |
| Bottom Bracket | Shimano Dura-Ace, BB-R9200 |
| Stem | Roval Rapide Cockpit, Integrated Bar/Stem |
| Tape | Supacaz Super Sticky Kush |
| Colours | Gloss Dove Grey / Silver Dust Blurred Impasto / Black Pearl, Gloss Solidity / Red To Black Pearl / Metallic White Silver |
| Sizes | 49, 52, 54, 56, 58, 61 |
| Brand | Specialized |
| Model Year | 2025 |
| Barcodes | 196625191176, 196625191428, 196625191558, 196625191831, 196625191848, 196625191985, 196625192036, 196625192104, 196625192234, 196625192548, 196625192630, 196625192692 |
| SKUs / Part Numbers | 94925-0049, 94925-0052, 94925-0054, 94925-0056, 94925-0058, 94925-0061, 94925-0149, 94925-0152, 94925-0154, 94925-0156, 94925-0158, 94925-0161 |
Please note: Manufacturers can sometimes change the specification of the products from time to time.
Why buy from Cycles UK?
We Deliver
You can choose how to receive your new bike. You can click and collect from our stores, pick a fast courier delivery or premium hand delivery. Whichever option you choose your bike will be fully assembled and checked by one of our experienced mechanics.
Price Promise
We regularly check our prices against our competitors to ensure that you are getting a good deal. If you find an item cheaper within seven days of purchase, just let us know and ask us to match the price.
Free Insurance
Our partners at Laka provides 30 days of free insurance on all new bikes sold to UK customers. As part of our service, your new bike is automatically covered with 30 days’ FREE insurance against theft and accidental damage.
Comfort Guarantee
Opinions of contact points such as saddles, shoes and grips can vary a lot between different riders. If you buy a contact point from Cycles UK and you don’t find it comfortable, you can return it within 30 days, and we’ll swap it for something else.
You May Also Like
How does it work?
- Add 30 days free insurance during checkout
- Complete your purchase
- Receive welcome docs by email
- Ride with peace of mind
Why Sundays?
Trust our 14 years of experience in the bicycle insurance industry. Our comprehensive, customisable, and competitively priced coverage includes easy online quotes, fast claims handling, and expert customer service.
Free 10 day bike insurance on your new bike!
We offer 10 days free cover with all new bikes purchased, provided by our insurance partner VeloLife. You will be covered for the first 10 days of ownership against theft and accidental damage, so you can purchase with confidence.
Give yourself the comfort of no obligation free insurance, make sure you have peace of mind from the moment you leave the store. If anything happens to the bike in the first 10 days of ownership, know you are covered!
with a £ 0.00 deposit.
The total charge for credit is £ 0.00.
Choose an available finance option:
To apply, add the item to your basket and apply for finance on your entire basket.
Please note the above quotation is an indicative cost and actual monthly payments may vary by +/- 2p per month.
Credit subject to status and affordability. Terms & Conditions Apply. Cycles UK Ltd is a credit broker and is Authorised and Regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk.
24 Month Representative Example:
Purchase Price (incl. VAT) £750
Deposit £75
Loan Amount £675
Interest/Total Charge for Credit £109.32
Total Amount Repayable £859.32
Balance Payable £784.32
By 24 Monthly Repayments of £32.68
15.9% APR Representative
Bank rate of interest 8.1% PA fixed
Please note the above quotation is an indicative cost and actual monthly payments may vary.
For Buy Now Pay Later and Deferred Interest Bearing Credit: Interest is charged from day 1 of your agreement, but not charged on any repayments made during the deferral period. On expiry of the deferral period, interest accrued during the deferral period will be applied to your repayments.
Consumer credit services are only available to over 18s and subject to status.
This is for estimation purposes only. Actual Finance Application is Completed During Checkout.