Specialized S-Works Tarmac SL8 Ultegra Sigma Exclusive Road Bike Built around Specialized's top-tier FACT 12r carbon frame, the S-Works Tarmac SL8 delivers an unmatched combination of aerodynamic speed, featherweight climbing capability, and razor-sharp handling. Engineered in the wind tunnel and refined using Rider-First philosophy, this machine cuts through headwinds with effortless efficiency while maintaining a remarkably smooth ride over rough asphalt. Equipped with the buttery-smooth electronic shifting of a full Shimano Ultegra Di2 disc groupset and fast-rolling Roval Rapide C 38 carbon wheels, it transfers every watt of your power directly to the road. Wrapped in tacky Supacaz handlebar tape and anchored by an ergonomic Specialized Power saddle, every contact point is crafted to keep you performing at your absolute peak during grueling miles and high-speed sprints alike. Pro-Level Precision with Electronic Shifting At the heart of the ride experience is the legendary Shimano Ultegra R8170 Di2 groupset, offering lightning-fast, fully customizable electronic shifting that operates flawlessly under heavy load. Hydraulic disc brakes deliver immense, predictable stopping power in any weather conditions, giving you total confidence through technical descents and tight hairpin turns. Up front, the fully integrated Roval Rapide cockpit hides cables away from the wind, dramatically reducing drag while providing a clean, aggressive aesthetic. Paired with supple S-Works Turbo TLR tubeless-ready tyres, this setup grips the road through high-speed cornering and minimises rolling resistance, ensuring you get maximum output from every single pedal stroke. Customisable Options & Component Specifications Because every cyclist's biomechanics and riding goals are unique, this exclusive build serves as a high-performance foundation that can be completely tailored to your specifications. Through our bespoke service, key components can be swapped and optimized prior to delivery to ensure a factory-fresh, perfect fit right out of the box. Adjust your gear ratios with a wide selection of crank lengths and cassette sizes, tune your handling with tailored stem length and handlebar width options, or upgrade to your preferred tyre width and tread pattern for maximum clearance and comfort.