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Cycling Weekly traces the Specialized Tarmac from its 2003 debut to the SL9, focusing on how rider feedback and racing results shaped successive versions. Specialized says the SL9 was designed with one-bottle racing positions in mind and calls it its fastest road bike; the report does not provide independent performance data to verify that claim.
Cycling Weekly has traced the Specialized Tarmac’s evolution from its 2003 aluminium debut to the current SL9, highlighting how professional riders’ feedback influenced the bike’s design. The report presents the SL9 as the latest of 10 Tarmac iterations and says it has already been used to win a world title, while Specialized’s performance claims remain company claims rather than independently documented test results in the source.
A central episode in the report comes from 2006, when Belgian sprinter Tom Boonen told Specialized that the Tarmac SL flexed too much as he prepared to sprint. Specialized brand voice leader Ben Capron recalled that Boonen dismissed the company’s stiffness-test data and demonstrated the movement he felt while riding. Specialized responded with a new testing method and a redesigned rear end, producing the Tarmac SL2.
Capron said Boonen later called the SL2 “the best bike I’ve ever ridden,” and recalled that the rider “won everything” that season. Those comments are Capron’s account of the development and its impact. The report describes the SL2 as a turning point, contrasting it with the original 2003 E5 aluminium Tarmac, which it characterizes as harsh to ride.
The newest model discussed is the S-Works Tarmac SL9. Specialized global programme manager Koes De Boer said the company reconsidered its aerodynamic testing after recognizing that it tested bikes with two bottles, while riders might race with one during breakaways. The report says the SL9 was shaped in part by Demi Vollering’s needs after she lost the 2024 Tour de France Femmes avec Zwift by four seconds. It also says she rode the SL9 to a World Championship victory in Montreal.
How Rider Feedback Shaped the Tarmac
The Tarmac’s history in the report illustrates how a high-performance product can change through feedback that laboratory measurements do not capture. Boonen’s complaint was about how the frame felt during a specific effort: winding up for a sprint. Specialized’s response, as described by Capron, included both a revised rear end and a different way of testing stiffness. That episode offers a concrete explanation for why the model moved beyond its early reputation as a harsh bike.
The SL9 account points to a similar feedback loop in aerodynamic design. Specialized says its testing assumptions did not match the one-bottle setup riders use in some breakaways. That distinction matters to racers and buyers because equipment can behave differently under real race conditions than in a standardized test setup. The report, however, provides no comparative figures that would let readers judge the scale of any speed gain.
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From Road-Bike Doubts to Pro Racing
Specialized’s road-bike ambitions were uncertain in the mid-to-late 1990s. Capron told Cycling Weekly that road bikes made up a single-digit share of the business at one point and recalled an internal discussion about leaving the road market. He said a colleague argued for committing to the category, with the ambition of eventually winning the Tour de France.
The company entered professional road racing through sponsorship of Festina in 2000, according to Capron. The team’s German sprinter Marcel Wüst won a Tour de France stage that July on an M4 aluminium bike; the first Tarmacs arrived in 2003. Specialized began sponsoring Quick-Step–Innergetic at the end of 2005, before Boonen’s 2006 feedback helped drive the SL2 redesign.
The report links the model to several major race results, while noting an important qualification: Alberto Contador won the 2010 Tour de France on a Tarmac SL3, but was subsequently stripped of the title. Vincenzo Nibali’s 2014 Tour win is described as the first valid Tour victory in this sequence. Peter Sagan then won three consecutive world titles on the Tarmac from 2015 to 2017, followed by Anna van der Breggen’s title in 2018.
““I don’t care about that””
— Ben Capron, Specialized’s leader of brand voice, recalling Tom Boonen’s 2006 feedback
What the SL9 Claims Do Not Show
Specialized calls the SL9 “the fastest road bike ever made,” but the supplied report does not include independent test results, comparison models, measured gains or details of the testing conditions behind that claim. It is also unclear from the material how much of the design change was specific to Vollering’s requirements, or how the frame performs across different bottle setups and riding conditions.
The source describes the SL9 as the latest Tarmac iteration and says it was released “this summer,” but it does not provide a publication date or a precise release date. The report also does not identify what model or design changes Specialized may introduce next.
The SL9’s Results and Future Revisions
For now, the report’s next point of reference is the SL9’s use in elite racing, including the Montreal World Championship victory attributed to Demi Vollering. Further race results may add evidence about how the model performs in competition, but a win alone does not measure the contribution of the bike relative to the rider, team or race circumstances.
Readers looking to compare the SL9’s speed claims will need detailed test data that identifies the comparison bikes, setup and conditions. Specialized could also provide more information about its one-bottle aerodynamic testing. The supplied material gives no announced date for a new Tarmac model or further technical update.
Key Questions
What is the latest Specialized Tarmac model covered in the report?
The report identifies the S-Works Tarmac SL9 as the latest iteration. It says the model was released that summer, but the supplied material does not give a precise release date.
How did Tom Boonen influence the Tarmac SL2?
In 2006, Boonen told Specialized that the Tarmac SL felt too flexible when he was preparing to sprint. According to Ben Capron, the company developed a new test and redesigned the bike’s rear end, resulting in the SL2.
What is Specialized’s claim about the SL9’s speed?
Specialized describes the SL9 as “the fastest road bike ever made.” The supplied report does not include independent test data or comparative measurements to verify that claim.
Which race results are associated with the Tarmac?
The report links the Tarmac to Vincenzo Nibali’s 2014 Tour de France win and Peter Sagan’s three consecutive world titles from 2015 to 2017, among other results. It also notes that Alberto Contador’s 2010 Tour title was later stripped.
Source: cyclingweekly.com
