Specialized Tarmac SL8 Expert Ultegra Di2 Bicycle
The Specialized Tarmac SL8 Expert Ultegra Di2 represents the pinnacle of speed and performance on the road, with an unbeatable combination of aerodynamics, lightness, and comfort. The result of over two decades of development and eight generations of improvements, this bike is designed to deliver maximum performance in any racing condition. Thanks to its ultralight FACT 10r Carbon frame, the 12-speed Shimano Ultegra Di2 electronic drivetrain, and Roval C38 carbon wheels, the Tarmac SL8 offers uncompromising efficiency.
Main features
Advanced aerodynamics: The optimized design reduces air resistance thanks to a perfected geometry and the ultra-slim seat post.
Extreme lightness: Frame weighs only 685 grams, 15% lighter than the previous generation.
Improved stiffness and comfort: An improved stiffness-to-weight ratio of 33%, ensuring responsiveness and stability on all types of terrain.
Suitable for everyone: Same geometry for men and women, without compromising on performance.
Technical specifications
Chassis
Frame: Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, threaded bottom bracket, 12x142mm thru-axle, flat-mount disc brakes
Fork: FACT 10r Carbon, thru-axle 12x100mm, flat-mount disc
Brakes
Front brake: Shimano Ultegra Di2 R8170, hydraulic disc brake, 160mm rotor
Rear brake: Shimano Ultegra Di2 R8170, hydraulic disc brake, 140mm rotor
Transmission
Shift commands: Shimano Ultegra R8170, hydraulic disc brake
Front derailleur: Shimano Ultegra R8150, welded mounting
Rear derailleur: Shimano Ultegra Di2 R8150, 12 speed
Cassette: Shimano Ultegra, 12 speed, 11-30T
Chain: Shimano Ultegra, 12 speed
Crankset: Shimano Ultegra R8100
Gears: 52/36T
Bottom bracket: Shimano threaded BSA BB
Wheels and Tires
Front wheel: Roval C38, 21mm internal width carbon rim
Rear wheel: Roval C38, 21mm internal width carbon rim
Front tire: S-Works Turbo, foldable, 700x26mm
Rear tire: S-Works Turbo, foldable, 700x26mm
Inner tubes: Turbo Ultralight, Presta valve 48mm
Cockpit
Handlebar attack: Integrated Tarmac, 6-degree incline
Handlebar curve: Specialized Expert Shallow Drop, alloy, drop 125mm x reach 75mm
Handlebar tape: Supacaz Super Sticky Kush
Saddle: Body Geometry Power Expert
Seatpost: S-Works Tarmac SL8 Carbon, FACT Carbon, setback of 15mm
Saddle collar: Integrated
Weight and Measure
Please note
Technical specifications may change without notice based on component availability.
The product images are purely indicative and may not exactly reflect the described features.
If you seek maximum speed without compromise, the Specialized Tarmac SL8 Expert Ultegra Di2 is the ultimate choice to dominate every race and achieve peak performance.
Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly
A Complete Guide to Bike Sizes
Foreword: Not all bike sizes are the same
Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.
Bicycle adjustment margins
Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.
How to use size charts
We've created a simple guide to help you find the right bike size:
- Check out our size charts for each bike type.
- Learn more with specific tips to help you make the right choice.
Size Charts: Find Your Perfect Bike
Gravel and road bikes
Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.
| Cut
|
Recommended height
|
Horizontal tube length
|
| XS |
Up to 157 cm |
48-50 cm |
| S |
157-167 cm |
50-53 cm |
| M |
168-178 cm |
53-56 cm |
| THE |
178-185 cm |
56-58 cm |
| XL |
Over 185cm |
58-62 cm |
For gravel, measurements may vary slightly due to different geometries, but remain similar.
Mountain bike
MTBs are measured in inches, based on the seat tube.
| Cut
|
Recommended height
|
Size (in inches)
|
| XS |
Up to 157 cm |
14"-16" |
| S |
157-167 cm |
15"-17" |
| M |
168-178 cm |
16"-19" |
| THE |
178-185 cm |
18"-20" |
| XL |
Over 185cm |
20"-23" |
Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .
Children's bikes
The size depends on the size of the wheels, often associated with age:
| Age
|
Wheel Size
|
| 1-3 years |
12" |
| 2-4 years |
14" |
| 4-6 years |
16" |
| 5-8 years |
20" |
| 8-10 years |
24" |
| Over 10 years |
26"/27.5" |
What to do with half measures?
If you are between two sizes:
-
Comfort : Choose the larger size.
-
Performance : Go for the smaller size.
Final tips for choosing
-
Consult the manufacturer's instructions : Always check the brand's guidelines.
-
Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
-
Test the bike : If possible, test the model you intend to purchase.
