To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. It is the world’s fastest race bike.
Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. It is the world’s fastest race bike.
Specialized

Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike in Gloss Red Sky

£6,099.00 £7,249.00 16% off
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

Returns

In the unlikely event that you are dissatisfied with your purchase please feel free to return your goods within 30 days of the purchase date for a full exchange or refund. Any item (excluding food and underwear) can be returned to us for any reason provided it is returned in ‘showroom condition’, with its original packaging, tags and a valid receipt/delivery note.

It is your responsibility to ensure that the item is returned to us in a safe and secure manner, and in the event of a refund or exchange, in saleable condition (in original packaging and including all warranty, cards, manuals and accessories).

Customers are accountable for return shipping charges.

If you purchased an item in one of our stores, you may return the items to either of our stores.

Return Items by Post

  1. You should always keep proof of postage and we advise you to use a ‘signed for service’ when returning goods.
  2. Send your package using a recorded delivery method (always keep a copy of your receipt!) to the following address.
South Downs Bikes
Internet Department
28 West Street
Storrington
West Sussex
RH20 4EE

If you wish to return your bike to us please keep it in the box it arrived in and contact us and we will arrange a collection.

Please note the following:

  • a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model.
  • b) If we have delivered the bicycle you ordered, but upon inspection you decide it is not the bike for you, we will charge you £50.00 for the collection.

Please do not ride the bike as a full refund cannot be given if the bike has been used or damaged.

Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike in Gloss Red Sky

Season:2026

Brand:Specialized

Code:42215765460177

Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. It is the world's fastest race bike, made even faster with the aero paradigm-shifting performance of the all-new Roval Rapide CL III wheels.

Aerodynamics or lightweight alone do not 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, the Ride Science team knows the Tarmac SL8 is the fastest race bike ever made on the routes that matter: 16.6 seconds faster over 40km, 128 seconds faster over Milan San Remo, and 20 seconds faster over the legendary Tourmalet climb.

The Tarmac SL8 Pro delivers exceptional performance with a full Shimano Ultegra 8100 series Di2 groupset with power meter, Roval Rapide CL III tubeless-ready wheelset, and a Roval Rapide cockpit. You are ready to race out of the box.

Features:

  • AERO IN EVERYTHING: Aerodynamics are placed where they matter—the leading edge—not just where they look good. In the process, this is the most aerodynamic road bike ever created, more aero than the Venge. Clean air is optimized for maximum advantage with the Tarmac’s new nose cone—the Speed Sniffer. By moving the steer tube back, the leading edge of the head tube can be much sharper, delivering a much lower drag shape. Utilizing new UCI rules, the Tarmac SL8 has the narrowest, most aero seat post ever made, ensuring fast-moving, dirty air around the legs can flow back more cleanly.
  • MINIMUM WEIGHT, MAXIMUM AERO: Tarmac SL8 took learnings from Aethos to be easily built at the UCI minimum with a full aero setup. The team delivered a 685 gram frame, 15% lighter than the Tarmac SL7 and lighter than anything else on the World Tour. Lessons from Aethos were applied with the ability to make lightweight a top priority in the down tube, seat tube, and rear of the bike. The frame’s shape carries load so efficiently that extra carbon stiffness layers become redundant.
  • GOES LIKE HELL, RIDES LIKE HEAVEN: With massive gains in stiffness-to-weight—an improvement of 33% over the SL7—the Tarmac SL8 takes legendary handling, aggressive responsiveness, and World Championship proven geometry to the next level. 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. Thanks to Rider-First Engineering, every rider, regardless of size, gets the same unprecedented ride quality and handling. In the saddle, the Tarmac SL8 delivers 6% more compliance, floating over rough road with a supple feel unique in the high-strung world of race bikes. Tarmac’s proven geometry and 32mm tire clearance are identical to the SL7, ensuring easy adaptation and the versatility to run higher volume tires when needed.
  • BEYOND GENDER: There can be more difference between two male cyclists than between a male and female. Gender alone does not provide nearly enough data to specialize, and that means creating male or female bikes is arbitrary and outdated. Every rider can get the next level advantage of Tarmac SL8.
  • 'Apple Find My' technology is now integrated in all SW & Pro 4iiii power meters. Riders can now enjoy the peace of mind that comes with knowing the exact location of their bikes.
Technical Information
  • Frame
    Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
  • Fork
    FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
  • Front brake
    Shimano Ultegra BR-R8170 hydraulic disc
  • Rear brake
    Shimano Ultegra BR-R8170 hydraulic disc
  • Shift levers
    Shimano Ultegra Di2 R8170, hydraulic disc
  • Front derailleur
    Shimano Ultegra Di2 R8150, braze-on
  • Rear derailleur
    Shimano Ultegra Di2 R8150, 12-speed
  • Cassette
    Shimano Ultegra, 12-speed, 11-30t
  • Chain
    Shimano XT M8100, 12-speed w/ quick link
  • Crankset
    Shimano Ultegra R81000 with 4iiii Precision 3+ Power Meter, 52/36t
  • Bottom bracket
    Shimano Threaded BSA BB
  • Front tire
    S-Works Turbo TLR Race Tire, 700x28c
  • Front wheel
    Roval Rapide CL III, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, DT350 hub, 18h, DT Swiss Competition Race Straight Pull Spokes
  • Rear tire
    S-Works Turbo TLR Race Tire, 700x28c
  • Rear wheel
    Roval Rapide CL III, Tubeless, 21mm internal width carbon rim, 48.5mm depth, Win Tunnel Engineered, DT350 hub, 24h, DT Swiss Competition Race Straight Pull Spokes
  • Inner tubes
    Standard 700 x 20-28 80mm PV
  • Handlebars
    Roval Rapide Cockpit, Integrated Bar/Stem
  • Tape
    Supacaz Super Sticky Kush
  • Saddle
    Power Pro Mirror, Hollow Ti rails
  • Seatpost
    S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
  • Seat binder
    Tarmac integrated wedge
  • Headset
    Stem headset spacers kit for SL7 stem & Roval Rapide cockpit use
  • Product id
    221576
  • Weight
    7.25 kg (15 lb, 15.7 oz)
  • Weight size
    56
Sizing Information
Professional Opinion
Product Reviews
Write a review
0 As rated by 0 customers

Write a review for Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike in Gloss Red Sky

Your name
Your email address
How would you rate it?
Would you recommend this product?
Let others know your opinion
Submit Review Close
Question(s) answered about Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike in Gloss Red Sky
Ask a question
Question(s) asked regarding Specialized Tarmac SL8 Pro Shimano Ultegra Di2 Road Bike in Gloss Red Sky

Ask a question

Your name
Your email address
Your phone number
Your question
Submit Question  Close
Home Road Cycling Bikes Specialized Road Bikes