The Tarmac SL8 Comp Di2 combines aerodynamic efficiency, low weight, and rider-first engineering to deliver a race bike that’s both fast and comfortable. With Shimano’s 105 Di2 12-speed groupset and disc brakes, it’s built for performance.

Key Features

• FACT 10r carbon frame, Rider-First Engineered, Win Tunnel tested aero shaping
• FACT 10r full carbon fork, 12x100mm thru-axle
• Shimano 105 Di2 12-speed electronic drivetrain
• Shimano 105 hydraulic disc brakes, flat-mount
• DT Swiss R470 wheelset, tubeless ready
• S-Works Turbo 700x26mm tyres with BlackBelt protection
• Speed Sniffer nose cone and aero seatpost design
• Available with 0% APR finance

The Specialized Tarmac SL8 Comp Di2 is the latest evolution in one of the most iconic race bikes on the road. Developed over eight generations, the SL8 blends aerodynamics, lightweight efficiency, and comfort in a package designed to make you faster everywhere – whether on a flat-out sprint, a mountain climb, or a rolling endurance ride.

At its heart is the FACT 10r carbon frame, built using Rider-First Engineering to ensure consistent handling and ride quality across every frame size. The frame’s aerodynamic profile, developed through Specialized’s Win Tunnel testing, includes the new Speed Sniffer nose cone head tube for reduced drag, a narrow aero seatpost, and integrated cable routing. These refinements make the SL8 the most aerodynamic Tarmac yet.

Weight savings are equally impressive. The SL8 is 15% lighter than the previous SL7, tipping the scales close to the UCI minimum. Drawing on design lessons from the Aethos, Specialized’s engineers optimised load paths through the frame to reduce excess material without compromising stiffness. The result is a frame that climbs with ease while remaining responsive under power.

The bike is fitted with a full Shimano 105 Di2 electronic groupset, delivering precise, reliable 12-speed shifting and powerful hydraulic disc braking. With an 11–34T cassette and compact chainset, you’ve got the gearing to cover steep climbs and high-speed efforts alike.

Rolling on DT Swiss R470 tubeless-ready wheels paired with Specialized S-Works Turbo 26mm tyres, the Tarmac SL8 maintains speed with low rolling resistance while offering confident grip. A S-Works SL8 carbon seatpost and Body Geometry Power Sport saddle keep comfort in balance with performance, making long rides and tough race days more manageable.

With 32mm tyre clearance, pro-level geometry, and a stiffness-to-weight ratio improved by 33% over the SL7, the Tarmac SL8 Comp Di2 is engineered to push the boundaries of what a race bike can deliver. It’s not just built for the pros – it’s built for any rider who wants the speed, efficiency, and ride quality of the world’s fastest race bike.

Occasionally, without notice, manufacturers change product design and/or specifications.