Specialized S-Works Tarmac SL9 - Shimano Dura-Ace Di2 Size:54 Lightweight construction keeps overall drivetrain

Lightweight construction keeps overall drivetrain weight low

and a barely-there feel

This material choice results in a seatpost that is both lightweight and strong

low-density foam layer sits closer to the head to reduce rotational forces

and integration

Specialized S-Works Tarmac SL9 - Shimano Dura-Ace Di2 Size:54 Lightweight construction keeps overall drivetrainThe Specialized S Works Tarmac SL9 redefines what it means to build the fastest road bike. Rather than chasing isolated metrics like lowest drag or lightest weight, Specialized engineered this machine around a single outcome: Time to Finish, the actual elapsed time to complete a real world race course. Through what the brand calls the Equation of Speed, every design decision factors in aerodynamics, weight, mechanical efficiency, rolling resistance,