Race-Bike Speed with Wireless SRAM AXS Shifting
The Specialized Tarmac SL8 Comp is a performance-focused carbon road bike for riders who want fast handling, efficient climbing and wireless electronic shifting in a practical complete build.
Its FACT 10r carbon frame carries the aerodynamic and ride-quality developments of the SL8 platform, while SRAM Rival AXS E1, hydraulic disc brakes and S-Works Turbo tyres make it ready for racing, fast bunch rides and demanding road events.
FACT 10r Carbon Performance
The FACT 10r carbon frame balances low weight, stiffness and compliance to create a bike that responds quickly without feeling unnecessarily harsh. It transfers power efficiently during accelerations and climbing efforts while retaining enough comfort for longer days.
Rider-First Engineered construction tunes the carbon lay-up for each frame size, helping every Tarmac SL8 deliver consistent handling and ride characteristics.
Aerodynamics Where They Matter
The Tarmac SL8 concentrates its aerodynamic development around the leading edges of the bike, including the narrow head tube, fork and seatpost. These areas meet the airflow first and provide meaningful opportunities to reduce drag.
Clean cable routing creates a tidy front end, while the separate stem and handlebar retain useful adjustment and make servicing or travelling with the bike more straightforward than a fully integrated one-piece cockpit.
Responsive Without Feeling Harsh
The SL8 delivers strong stiffness through the bottom bracket and front end, giving it an immediate response when accelerating or changing direction. Additional compliance beneath the rider helps improve comfort across uneven roads and coarse chip seal.
This balance allows the bike to feel sharp during racing while remaining manageable on longer training rides, gran fondos and endurance events.
SRAM Rival AXS E1 Electronic Shifting
SRAM Rival AXS E1 provides precise wireless electronic shifting through a 2 x 12-speed drivetrain. The 48/35T crankset and wide-range 10–36T cassette provide useful climbing gears without giving up the ratios needed for fast road riding.
Wireless communication between the controls and derailleurs creates a clean installation with no mechanical shift cables. The derailleur batteries are removable, making charging simple and allowing riders to carry a spare on longer trips.
Shift behaviour and control-button functions can be customised through the SRAM AXS app.
SRAM Rival E1 Hydraulic Brakes
SRAM Rival E1 hydraulic disc brakes provide smooth and predictable control in wet or dry conditions. The 160 mm front and rear rotors deliver balanced braking performance for fast descents and technical roads.
The updated E1 controls offer comfortable ergonomics and require relatively little hand effort, helping reduce fatigue during longer rides.
Tubeless-Ready DT Swiss Wheels
DT Swiss R470 wheels provide a dependable and easily serviced foundation for training and racing. Their tubeless-ready rims allow riders to improve comfort and puncture protection once converted with suitable tyres, valves and sealant.
S-Works Turbo 700 x 26c tyres provide supple, fast-rolling performance with BlackBelt puncture protection. The frame has clearance for tyres up to 32 mm, giving riders the option of additional comfort and grip on rougher roads.
Key Features
- Tarmac SL8 FACT 10r carbon frame
- Rider-First Engineered construction
- Win Tunnel-developed aerodynamic shaping
- FACT 10r carbon fork
- SRAM Rival AXS E1 wireless 2 x 12-speed drivetrain
- SRAM Rival E1 48/35T crankset
- SRAM Rival XG-1250 10–36T cassette
- SRAM Rival E1 hydraulic disc brakes
- 160 mm front and rear brake rotors
- DT Swiss R470 tubeless-ready wheels
- S-Works Turbo 700 x 26c tyres
- Clearance for tyres up to 32 mm
- S-Works Tarmac SL8 carbon seatpost
- Clean internal cable routing
- Threaded bottom bracket
- Claimed weight of 7.77 kg in size 56
Who Is It For?
- Road racing
- Fast bunch rides
- Performance-focused training
- Gran fondos and endurance events
- Hilly and mixed-profile courses
- Riders wanting wireless SRAM AXS shifting
- Riders looking for an SL8 platform with strong upgrade potential
The Tarmac SL8 has a race-focused riding position. Riders wanting a more upright position for relaxed recreational riding may be better suited to an endurance road bike such as the Specialized Roubaix.
Our Thoughts
The Tarmac SL8 Comp gives riders the part of the bike that matters most: the FACT 10r SL8 frame. It has the responsive handling, aerodynamic shaping and improved compliance that make the SL8 such a capable all-round race bike without pushing the build into top-level pricing.
SRAM Rival AXS E1 is a sensible match for this model. The shifting is accurate, the controls are comfortable and the 10–36T cassette gives the bike enough climbing range for steep or long routes. The S-Works Turbo tyres are also a worthwhile inclusion and help the bike feel quick from the outset.
The DT Swiss R470 wheels are durable and practical, although they are the obvious place to upgrade later. Add a quality carbon wheelset and the Tarmac SL8 Comp becomes a noticeably lighter and faster package without needing to replace the frame or drivetrain.
Why Buy from Chain Reaction?
- Official Specialized dealer
- Professionally assembled, tuned and safety checked
- Brakes professionally bedded using our Sinter Smart bedding-in machine
- SRAM AXS drivetrain checked, updated and configured
- Initial saddle, handlebar and control setup
- Complete bike and electronic drivetrain walkthrough
- Expert road-bike sizing and setup advice
- Practical maintenance and charging advice
- Finance and WorkRide options available