In this comparison, I’ll dissect two popular bike models; the Specialized Tarmac SL8 vs Scott Addict RC.
I’ll compare their lineups, bike specifications, and suggested retail prices in USD, then discuss the carbon fiber technology (Specialized FACT and Scott High Modulus Carbon) and frameset technologies.
The goal is to give you a better understanding of Specialized Tarmac SL8 and Scott Addict RC to help in your decision-making.
| Specialized Tarmac SL8 | Scott Addict RC | |
|---|---|---|
| Type of bike | All-rounder | All-rounder |
| Frame material | FACT 12r carbon FACT 10r carbon | HMX-SL carbon HMX carbon |
| Frame sizes | 44, 49, 52, 54, 56, 58, 61 | 47, 49, 52, 54, 56, 58, 61 |
| Groupset | Shimano, SRAM (12-speed) | Shimano, SRAM (12-speed) |
| Brakes | Hydraulic disc | Hydraulic disc |
| Cabling | Internal | Internal |
| Price (USD) | TBD | $4,799 to $15,999 |
Specialized Tarmac SL8
The Specialized Tarmac SL8 is the latest, all-rounder race bike.
Now in its eighth iteration, hence SL8, the Specialized Tarmac improves on the features of the Tarmac SL7 that made it one of the best bikes in professional cycling and a leading bike brand among amateur cyclists.
According to Specialized, the Tarmac SL8 has a 33% improvement in stiffness-to-weight ratio compared to the Tarmac SL7. The most significant improvement is in aerodynamics; a larger head tube with a sharper nose cone. Specialized calls this the Speed Sniffer.
The S-Works version retains the same FACT 12r carbon, while the Specialized Pro and Expert versions use the FACT 10r carbon. The difference between the S-Works and Specialized versions lies in the carbon fiber grade, choice of groupset, wheels, and components. The S-Works versions come with the newly launched Roval Rapide Cockpit, a one-pice carbon handlebar.
A size 56 bike weighs 6.62 kg (14.6 lbs) with a Shimano Dura-Ace Di2 groupset, and 6.85 kg (15.1 lbs) with a SRAM Red AXS.
There are six models in the Specialized Tarmac SL8 lineup based on its groupset setup. All models are electronic shifting only. It’s also available in frameset only for S-Works and for Specialized versions.
| Model | Frame material | Groupset | Wheelset | Max. tire size | Retail price (USD) |
|---|---|---|---|---|---|
| S-Works Tarmac SL8 | FACT 12r carbon | Shimano Dura-Ace Di2 (R9200) | Roval Rapid CLX II (51mm front, 60mm rear) | 32mm | $14,000 |
| S-Works Tarmac SL8 | FACT 12r carbon | SRAM Red eTap AXS | Roval Rapid CLX II (51mm front, 51mm rear) | 32mm | $14,000 |
| Specialized Tarmac SL8 Pro | FACT 10r carbon | Shimano Ultegra Di2 (R8100) | Roval Rapid CL II (51mm front, 60mm rear) | 32mm | $8,500 |
| Specialized Tarmac SL8 Pro | FACT 10r carbon | SRAM Force eTap AXS | Roval Rapid CL II (51mm front, 60mm rear) | 32mm | $8,500 |
| Specialized Tarmac SL8 Expert | FACT 10r carbon | SRAM Rival eTap AXS | Roval C38 (38mm) | 32mm | $6,500 |
More reading : Specialized Tarmac SL8 vs SL7 - What's Changed?
Scott Addict RC
The Scott Addict RC Ultimate is a top-of-the-line model made from the superlight HMX SL Carbon. The Scott Addict RC Pro is next in line with the HMX Carbon. Both models have a fully integrated, one-piece carbon handlebar.
Further down the line are five Scott Addict RC models built with the HMX Carbon. They use a two-piece aluminum handlebar, and the cables are fully hidden. RC stands for Racing Concept, and the Addict RC is Scott’s performance racing bike.
There’s also a women-specific Scott Contessa Addict RC similar to the standard version, except for the touchpoints, saddles, handlebars, and compact cranksets.
| Model | Frame material | Groupset | Wheelset | Retail price (USD) |
|---|---|---|---|---|
| Scott Addict RC Ultimate | Carbon (HMX-SL) | SRAM Red eTap AXS | Zipp 353 NSW | $15,999 |
| Scott Addict RC Pro | Carbon (HMX) | Shimano Dura-Ace Di2 (R9200) | Zipp 303SE | $9,999 |
| Scott Addict RC 10 | Carbon (HMX) | SRAM Force eTap AXS | Syncros Capital 1.0 35 | $7,599 |
| Scott Addict RC 15 | Carbon (HMX) | Shimano Ultegra Di2 (R8100) | Syncros Capital 1.0 35 | $6,799 |
| Scott Addict RC 20 | Carbon (HMX) | SRAM Force eTap AXS | Syncros RP2.0 | $6,299 |
| Scott Addict RC 30 | Carbon (HMX) | SRAM Rival eTap AXS | Syncros RP2.0 | $5,299 |
| Scott Addict RC 40 | Carbon (HMX) | Shimano 105 Di2 (R7100) | Syncros RP2.0 | $4,799 |
Scott Addict RC vs others
Specialized vs Scott carbon fiber
Specialized FACT Carbon
Specialized FACT (Functional Advanced Composite Technology) is an advanced carbon fiber technology used in high-performance Specialized bicycles. It offers a lightweight yet strong frame construction with precise carbon layup, resulting in optimal strength-to-weight ratio and improved ride quality.
FACT carbon frames are engineered to efficiently transfer power, absorb road vibrations, and provide a comfortable riding experience. With continuous innovation and refinement, FACT Carbon demonstrates Specialized’s commitment to delivering top-notch performance and enhancing the overall cycling experience.
The carbon is available in three grades. The choice between FACT 12r, 11r, or 10r carbon depends on the bike model, your preferences, riding style, and budget.
- Specialized FACT 12r Carbon is the highest-grade carbon used by Specialized. Bikes (S-Works models) with frames made from FACT 12r carbon are the lightest and stiffest in the Specialized line-up. These frames are manufactured using the most advanced techniques and materials.
- Specialized FACT 11r Carbon used to be the highest-grade carbon until the S-Works Tarmac (SL5). Today, it’s the highest-grade carbon for the S-Works Roubaix.
- Specialized FACT 10r Carbon is two steps below 12r in the Specialized carbon hierarchy. While it doesn’t provide quite the same level of weight savings and stiffness as 12r, 10r frames are still very light and stiff, providing a high level of performance. FACT 10r carbon is used in all non S-Works models and is ideal for riders who want a balance of performance and value.
Scott High Modulus Carbon
Scott implements two primary types of carbon fiber technology in their bicycle frame construction; HMX-SL, HMX, and HMF carbon.
- HMX-SL (High Modulus Xtreme, Super Light) carbon is the pinnacle of Scott’s carbon fiber technology. This innovative blend of carbon fiber is designed for ultimate stiffness and minimal weight. Scott uses HMX-SL Carbon in their highest-end models, such as the premium version of the Scott Addict RC Ultimate and Foil RC Ultimate road bike. These bikes, with HMX-SL Carbon frames, are the go-to choice for professional cyclists competing in world-class races.
- HMX carbon is a level below the HMX-SL, and is still a top-tier carbon material offering a fantastic blend of stiffness and lightweight construction, albeit not as light or rigid as the HMX-SL. It’s an excellent choice for serious and experienced cyclists looking for a high-performance bike without the additional premium.
- HMF (High Modulus Fiber) carbon, may not be as light or stiff as HMX carbon, but it’s still a superior material that contributes to a robust, light, and efficient ride. Scott uses HMF carbon in their bikes that strike a balance between affordability and performance.
Frameset technologies and innovations
Specialized Tarmac SL8 and Scott Addict RC framesets incorporate advanced technologies to enhance their bikes’ performance and ride characteristics.
Here’s an overview of the technologies used in each bike model.
Specialized Tarmac SL8
| Name | Description |
|---|---|
| FACT carbon | Functional Advanced Composite Technology (FACT). A carbon fiber construction method that balances lightweight, stiffness, and compliance in Specialized bike frames. Available in two carbon grades; FACT 12r and 10r. A higher number indicates a higher grade of carbon. S-Works models use the FACT 12r carbon and Specialized Pro and Expert models use the FACT 10r carbon. |
| Rider-First Engineered™ | Rider-First Engineered™ is a design philosophy used by Specialized that ensures every frame size delivers the same predictable and responsive ride characteristics. This concept was first introduced with the 2015 Tarmac, and the idea has been incorporated into all models since. Instead of simply scaling frame sizes, Specialized takes into account that riders of different sizes have different weights, which are distributed differently. This means that each frame size experiences different forces. Therefore, each frame size is engineered independently with different carbon layups and tube dimensions, ensuring the optimal balance of rigidity, weight, and responsiveness for each size. In short, no matter what the frame size is, the ride quality and performance remain consistently excellent. |
| Win Tunnel | Specialized utilizes advanced tools and technologies to pursue aerodynamic excellence, such as the Win Tunnel, FreeFoil Shape Library, Computational Fluid Dynamics (CFD), and Data Acquisition (DAQ) system. The goal is to optimize aerodynamic performance by conducting wind tunnel tests, developing new airfoil shapes, simulating fluid flow, and collecting real-world data to improve rider position and enhance overall performance. |
Scott Addict RC
| Name | Description |
|---|---|
| Oversize Bottom Bracket | The Addict RC features an oversized down tube and bottom bracket intersection, among the widest on the current road bike market. This extensive cross-section and smooth transition handle loads effectively, reducing unwanted frame flex and ensuring efficient power transfer to the drivetrain. |
| Hollow Frame Structure | The entire frame set of Addict RC is built with a hollow structure and has an immaculately clean inside, which significantly reduces the overall weight. |
| One-Piece Handlebar | The Syncros Combo Creston IC handlebar is neat, with all cables completely routed internally through the bar, headset, and into the frame as part of Scott’s new Integrated Cable Routing (ICR). Collaborating with GebioMized, the handlebar design optimizes ergonomics for riders. |
| Evo-Lap Technology | Scott applies Evo-Lap technology in designing the Addict RC, using Finite Element Analysis (FEA) software to simulate different forces on the frame and optimize the carbon lay-up. By modeling the frame and testing stress distribution in different areas, Scott has optimized carbon layers throughout the frame, creating a lightweight yet resilient structure. |
Where to buy
Specialized shops
- Specialized online shops. Argentina, Australia, Austria, Belgium, Brazil, Canada, Chile, China, Colombia, Czech Republic, Denmark, Finland, France, Germany, Italy, Japan, Luxembourg, Mexico, Netherlands, New Zealand, Poland, Portugal, Singapore, Slovakia, South Korea, Spain, Sweden, Switzerland, Taiwan, United Kingdom, United States
- Specialized retailers. Use this tool to find your nearest Specialized retailers.
Scott retailers
- Scott retailers. Use this tool to find your nearest Scott retailers.
- Scott distributors. Use this tool to find your local Scott distributors.
Bernard Lu has 7+ years of experience working in a bicycle shop, overseeing the retail and workshop operations. He’s a qualified bicycle mechanic who understands a cyclist’s needs and speaks the same cycling lingo.
If you meet him at the cafe, he will happily talk to you for hours about all the intricacies of bikes and cycling tech. Just buy him a coffee next time you see him.