Specialized Tarmac SL9 S-Level: A More Accessible 'Second Fastest' Road Bike

Specialized has unveiled the Tarmac SL9 S-Level, an iteration of their renowned S-Works Tarmac SL9, now positioned as an accessible alternative for serious cyclists. Following the S-Works model's debut, lauded as the "fastest road bike ever created," the S-Level enters the market with the compelling claim of being the "second fastest bike ever made." This strategic release aims to extend elite-level performance to a broader audience, demonstrating that cutting-edge cycling technology can be delivered at various price points without significant compromise.

The Tarmac SL9 S-Level mirrors many of the groundbreaking aerodynamic innovations found in the S-Works version. Engineered using advanced computational fluid dynamics and wind tunnel testing with a moving mannequin, both models benefit from a refined design that minimizes aerodynamic drag. Key shared features include the redesigned Speed Sniffer headtube, which notably reduces the bike's frontal area, and a more slender seatpost optimized to manage airflow around the rider's legs. Additionally, the innovative WinFin design, a reconfigured seat tube and rear triangle junction, addresses airflow disruption caused by the removal of a second water bottle during races, highlighting Specialized's meticulous attention to real-world performance gains. These shared attributes ensure that the S-Level retains a significant portion of the S-Works' speed advantage.

Shared Aerodynamic Innovations

The Tarmac SL9 S-Level incorporates the same advanced aerodynamic features that define its premium S-Works counterpart, ensuring a high-performance riding experience. Central to its design is the Speed Sniffer headtube, which has been meticulously reshaped to an hourglass profile. This modification, achieved by rerouting the rear brake hose and utilizing an offset steerer tube, results in a remarkable 10% reduction in the bike’s frontal area. This smaller frontal profile significantly decreases aerodynamic drag, allowing riders to maintain higher speeds with less effort. Furthermore, the bike features a re-engineered seatpost, now thinner and deeper, specifically designed to enhance airflow from the rider's legs into the space between the legs and the frame before it reaches the seatpost, thereby optimizing overall aerodynamic efficiency.

Beyond the headtube and seatpost, the S-Level also includes the innovative WinFin design, a direct outcome of Specialized's detailed analysis of professional racing scenarios. This feature reconfigures the seat tube and rear triangle junction to optimize airflow, particularly when a rider discards a second water bottle during a race. By accounting for this common occurrence, Specialized has fine-tuned the bike's rear aerodynamics, claiming a marginal but measurable saving of 0.5 watts compared to the previous SL8 model. These integrated design choices underscore Specialized's commitment to delivering a high-speed machine, making the S-Level a formidable contender that offers near-identical aerodynamic advantages to its more expensive sibling.

Optimized Value and Performance

While sharing core aerodynamic advancements, the Tarmac SL9 S-Level distinguishes itself through material composition, weight, and ultimately, a more accessible price point. Unlike the S-Works model, which exclusively utilizes Specialized's top-tier Fact 12r carbon throughout the frameset, the S-Level employs a combination of Fact 10r carbon for the frame and Fact 12r for the forks. This material adjustment introduces a slight weight increase, with the S-Level frame weighing 882 grams compared to the S-Works' 687 grams. However, this difference of less than 200 grams is minimal, allowing complete S-Level builds to remain impressively lightweight, with some configurations weighing as little as 7.13kg. The strategic use of Fact 10r carbon is pivotal in achieving a significant price reduction, making the S-Level a compelling option for those seeking elite performance without the premium cost of the S-Works.

The price difference between the two models is substantial, with the S-Level retailing at approximately £8,799 / $10,500 compared to the S-Works’ £11,999 / $14,000 (with SRAM Red AXS or Shimano Dura-Ace Di2). This considerable saving allows amateur racers and enthusiasts to invest in a high-performance machine that closely mimics the S-Works' capabilities. The S-Level comes equipped with quality components such as Roval CL III wheels and a Power Pro Mirror saddle, while both models share the integrated Roval Rapide carbon cockpit. For many cyclists, the marginal weight difference of the S-Works may not justify the significant price premium, making the S-Level a highly competitive and intelligent choice for achieving world-class performance and an elevated cycling experience at a more attainable price.