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Nothing is faster than the 2025 Specialized Tarmac SL8 Pro Ultegra Di2 Road Bike in Gloss Silver thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible.
Nothing is faster than the 2025 Specialized Tarmac SL8 Pro Ultegra Di2 Road Bike in Gloss Silver thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible.
Specialized

2025 Specialized Tarmac SL8 Pro Ultegra Di2 Road Bike in Gloss Silver

£7,424.00 £8,250.00 10% off
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We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Please contact us prior to returning so we can ensure the fastest suitable resolution for you: websales@99bikes.co.uk. We also ask that you contact us before having a 3rd party undertake work on an item purchased from 99 Bikess. Any work carried out without 99 Bikes consent will not be eligible for reimbursement and may void future warranty claims for that item.

2025 Specialized Tarmac SL8 Pro Ultegra Di2 Road Bike in Gloss Silver

Season:2025

Brand:Specialized

Code:9492513

Nothing is faster than the 2025 Specialized Tarmac SL8 Pro Ultegra Di2 Road Bike in Gloss Silver thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. After eight generations and over two decades of development, it’s more than the fastest Tarmac ever - it’s the world’s fastest race bike. Your legs up for it?


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 our 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, 20 seconds faster over the legendary Tourmalet climb.

Key Features:

  • AERO IN EVERYTHING: We’re putting aero where it matters - the leading edge - not just where it looks good. In the process we’ve created our most aerodynamic road bike ever. Yes, it’s 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 tube that determines head tube width - 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 we’ve ever made ensuring fast moving, dirty air around the legs can flow back more cleanly. Doesn’t victory smell sweet?
  • MINIMUM WEIGHT, MAXIMUM AERO: Tarmac SL8 took learnings from Aethos to be easily built at the UCI minimum with a full aero set up. The team delivered a mind bending, scale tickling 685 gram frame - 15% lighter than the Tarmac SL7 and lighter than anything on else on the World Tour*. With the ability to make lightweight a top priority in the down tube, seat tube, and rear of the bike lessons from Aethos were applied. The frame’s shape carries load so efficiently that extra carbon stiffness layers become redundant. *Unless of course you count the time Kasper Asgreen raced our 585 gram Aethos frame during a Tour stage.
  • 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 our 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 doesn’t 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. It’s time to go Beyond Gender.
  • The Tarmac SL8 Pro delivers exceptional performance with a full Shimano Ultegra 8100 series Di2 groupset with power meter, Roval Rapide CL II tubeless-ready wheelset, and a Roval Rapide Handlebar with an SL7 stem. You’re ready to race out of the box.
All UK Mainland Bike Deliveries Over £999 - Free

Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).
Bike orders under £999 will incur a £20 delivery fee

Free Delivery On Orders Over £50.00

When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).

Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.

Click & Collect Orders

Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.

Spread the cost of your new bike, helmet, safety equipment and accessories paying via instalments being taken directly from your wage. The payments for the Cycle To Work scheme are taken out of your gross wage and your Tax & NI contributions are then worked out based on your new lower gross wage which is how you save money on your new bike and equipment.

At the end of the time period specified with your Cycle To Work scheme you then have the option of buying your bike or to continuing to use it while you work for the company. If you decide to purchase the bike, the balance you owe will be based on a percentage of how much the bike was worth at the time you took out the Cycle To Work scheme.

We know how eager you'll be to jump on your new bike and hit the dirt or tarmac, so we give you everything you need to get you set up quickly. For full instructions on how you're bike will arrive and what you'll need to do, visit our How Our Bikes Are Built page

Easy Set-Up Instructions

Have your brand spanking new bike ready to ride in less than 15 minutes with our easy to follow guide.

Free Multi-Tool

9 in 1 multi-tool to help you set up and maintain your bike.

Free Pedal Spanner

Attach your pedals with ease using our free tool. Please note pedals are not included with all bikes so please check the specification. You can shop our awesome range of pedals HERE

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 Di2 R8170, hydraulic disc

Rear Brake: Shimano Ultegra Di2 R8170, hydraulic disc

Chainrings: 52/36T

Cassette: Shimano Ultegra, 12-speed, 11-30t

Bottom Bracket: Shimano Threaded BSA

Crankset: Shimano Ultegra R8100 with 4iiii power meter

Rear Derailleur: Shimano Ultegra Di2 R8150, 12-speed

Front Derailleur: Shimano Ultegra Di2 R8150, braze-on

Shift Levers: Shimano Ultegra Di2 R8170, hydraulic disc

Chain: Shimano Ultegra, 12-speed

Inner Tubes: Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve

Front Tire: S-Works Turbo, 2BR, 700x26mm

Rear Tire: S-Works Turbo, 2BR, 700x26mm

Front Wheel: Roval Rapide CL II, 21mm internal width carbon rim tubeless ready, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Revolution spokes, 51mm depth

Rear Wheel: Roval Rapide CL II, 21mm internal width carbon rim tubeless ready, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Revolution spokes, 60mm depth

Saddle: Power Pro with Mirror

Stem: Roval Rapide Cockpit, Integrated Bar/Stem

SeatPost: S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset

Handlebars: Roval Rapide Cockpit, Integrated Bar/Stem

Tape: Supacaz Super Sticky Kush

Seat Binder: Tarmac integrated wedge

Headset: STEM HEADSET SPACERS KIT FOR SL7 STEM & ROVAL RAPIDE COCKPIT USE

Product ID: 274935

Weight Size: 56cm

Weight: 7.16 kg (15 lb, 12.6 oz)

Sizing Information

Specialized Bikes Size Guide

Please note the following size guides are a general overview and represent a rough guide to Specialized Bicycles sizing.
Each bike may deviate from these figures, please refer to the specific geometry details or contact us for more precise sizing.


Specialized Mountain Bike Size Guide (including Turbo E-Bikes)

SizeXSSMLXLXXL
Height (cm)147 - 155157 - 168167 - 178166 - 188185 - 193193 - 198


Specialized Road and Gravel Bike Size Guide

Size444950525456586164
Height (cm)142 - 155155 - 163157 - 162162 - 170170 - 175175 - 180180 - 188187 - 196195 - 206


Specialized Hybrid Bike Size Guide

SizeXXSXSSMLXLXXL
Height (cm)142 - 150149 - 157155 - 165165 - 175175 - 189188 - 193193 - 198
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