The aero work is visible once you know where to look. The Speed Sniffer head tube loses 4mm of width , and a dropped down tube manages airflow through the high-pressure zone behind the front wheel. The Flow Fork twists its blades to smooth airflow and cut the turbulence the rotating front wheel creates , and at the rear the Win Fin reworks the seat tube junction using the Time to Finish metric . The S-Level keeps all of those SL9 aero features , which is the part that matters: aerodynamics are not where this build saves money.

Shimano Dura-Ace Di2 handles shifting, and there is no mid-tier drivetrain option on this platform . The 12-speed system runs ST-R9270 levers to R9250 derailleurs front and rear, with an FC-R9200 HollowTech II crankset in 52/36T and a CS-R9200 cassette in 11-34T . That spread covers flat sprints and steep gradients without a chainring swap. Braking is Dura-Ace BR-R9270 hydraulic disc at both ends , flat-mount, which is what you want when descending is where you plan to make time. The crankset carries a 4iiii Precision Pro dual-sided powermeter as standard , so training data is built in rather than being an aftermarket purchase you budget for later.

Wheels are Roval Rapide CL III, tubeless carbon with a 21mm internal rim width, 51mm of depth up front and 48.5mm at the rear, built on DT350 hubs laced 18h front and 24h rear with DT Swiss Competition Race straight-pull spokes . The split depths are deliberate, tuned as a front-and-rear system rather than a matched pair, and the hub and spoke package is one any competent mechanic can service or rebuild. Specialized Cotton TLR tires in 700x30c come mounted , and the frame clears up to 32mm of actual tire width , leaving room to go wider for rough pavement or a classics-style course.

The Roval Rapide integrated cockpit is the same fully integrated front end the platform is built around , keeping cable routing hidden and the frontal area tidy. An S-Works Tarmac SL8 carbon seatpost takes care of the back end , dropping into a Tarmac integrated wedge binder. The frame keeps a threaded bottom bracket, 12x142mm rear thru-axle, flat-mount disc, and a UDH dropout , all of which make long-term service and hanger sourcing straightforward. Complete weight lands at 7.1kg in a size 56 . Satin Carbon with Silver Dust keeps the finish understated on a bike that is otherwise very much a race machine.