SpecializedTarmac SL8 Expert – Ultegra Di2 2025 bike details 02
SpecializedTarmac SL8 Expert – Ultegra Di2 2025 bike details 03
SpecializedTarmac SL8 Expert – Ultegra Di2 2025 bike details 04
SpecializedTarmac SL8 Expert – Ultegra Di2 2025 bike details 05
SpecializedTarmac SL8 Expert – Ultegra Di2 2025 bike details 01

Summary

The Specialized SpecializedTarmac SL8 Expert – Ultegra Di2, a Road bike released in 2025, priced at £6000. It weighs approximately 7.2kg, balancing performance and efficiency. It features a frame made of Carbon Fiber and a fork constructed from Carbon Fiber. The bike is equipped with a Shimano Ultegra R8150, braze-on groupset (Electric Shifting: No). It uses Disc Brake braking for confident stopping power. Rolling on a Front: Roval C38, 21mm internal width carbon rim, Rear: Roval C38, 21mm internal width carbon rim wheelset, it features a Shimano Threaded BSA BB bottom bracket for drivetrain efficiency. It uses Internally Routed cable routing for a cleaner look and improved aerodynamics. It supports tires up to 32 mm, offering flexibility for comfort or off-road use. This bike is UCI compliant, meaning it can be used in officially sanctioned races. It comes with a lifetime warranty. Curious how it stacks up against similar bikes? Compare below...

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Quick Compare SpecializedTarmac SL8 Expert – Ultegra Di2 to:

Bike Info

Worldwide Shipping: Yes

Delivery across the globe!

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Warranty: Lifetime

Limited warranty website average: 3.12 years

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Released: 2025

The bike was released this year

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Bike Type: Road

The style of riding intended for this bike

Bike Spec

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Weight: 7.2 kg

The website average for Road bikes is 8.57 kg. This bike is 1.38 kg under the average. Total bike weight may vary depending on frame size.

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Groupset

Shimano Ultegra R8150, braze-on

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Wheelset

Front: Roval C38, 21mm internal width carbon rim, Rear: Roval C38, 21mm internal width carbon rim

Disc Brake

Brake Type: Disc Brake

Welcome to the future!

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Frameset Material

Carbon Fiber

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Max Tire Size: 32 mm

This is the max tire size you can use

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UCI Approved: Yes

You can use for official races

Sizing & Geometry

Frame Sizes

44 49 52 54 56 58 61

This frame comes in 7 sizes, this is 1.45 more sizes than the website average.

Handebar Sizes Available

38 40 42 44

Crank Arm Sizes Available

165 170 175

Frame Details

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Frame Weight

Unknown

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Frame Material

Carbon Fiber

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Forks

Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc

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Fork Material

The forks are made from Carbon Fiber

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Cables: Internally Routed

Routed through bars, stem and frame

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Axel Type: Thru-axle

How the wheels are secured to the frame

Disc Brake

Brake Type: Disc Brake

Welcome to the future!

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Brake Mount: Flat Mount

How the calipers are mounted

Yes

Integrated bar and stem: Yes

The bar and stem are integrated

Drivechain Details

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Groupset name

Shimano Ultegra R8150, braze-on

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Electric Groupset: No

This bike doesn't have electric gears

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Shifters

Shimano Ultegra R8170, hydraulic disc

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Front Derailleur

Shimano Ultegra R8150, braze-on

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Rear Derailleur

Shimano Ultegra Di2 R8150, 12-speed

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Cassette

Shimano Ultegra, 12-speed, 11-30t

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Cranks

Shimano Ultegra R8100, 52/36T

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Power Meter: No

This bike doesn't have a power meter

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Bottom Bracket

Shimano Threaded BSA BB

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Chain

Shimano Ultegra, 12-speed

Wheel & Tire Details

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Wheelset Name

Front: Roval C38, 21mm internal width carbon rim, Rear: Roval C38, 21mm internal width carbon rim

Front Wheel Depth Icon

Front Wheel Depth

Unknown

Rear Wheel Depth Icon

Rear Wheel Depth

Unknown

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Tires

Front: S-Works Turbo, folding bead, 700x26mm, Rear: S-Works Turbo, folding bead, 700x26mm

Tire Type Icon

Tire Type

Unknown

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Max Tire Size: 32 mm

This is the max tire size you can use

Brakes

Disc Brake

Brake Type: Disc Brake

Welcome to the future!

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Brake Mount: Flat Mount

How these disc brakes are mounted

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Brakes

Front: Shimano Ultegra Di2 R8170, hydraulic disc 160mm rotor, Rear: Shimano Ultegra Di2 R8170, hydraulic disc 140mm rotor

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Brake Rotors

Unknown

Other Components

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Saddle

Body Geometry Power Expert

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Seatpost

S-Works Tarmac SL8 Carbon seat post

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Handlebars

Specialized Expert Shallow Drop, alloy, 125mm drop x 75mm reach

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Bar Tape

Supacaz Super Sticky Kush

Manufactures Description

Nothing is faster than the Tarmac SL8 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 combina ... Read More