Which road bikes have the best gear systems?

High-end lightweight road race bike built on Scott's HMX SL carbon frame with integrated Syncros cockpit and hydraulic disc brakes. It uses a 12-speed Super Record groupset, 700c wheels, and suits racers and climbers seeking minimal weight and high performance.

A top-tier race bike pairing an ultra-light FACT 12r carbon frame with a full Shimano Dura-Ace 12-speed Di2 groupset and Roval Rapide wheels and cockpit. It balances aerodynamic performance, low weight and compliance, suited for racers and serious enthusiasts seeking a fastest-possible all-round road bike.

Ultra-lightweight, aero-optimized road bike built on a high-modulus carbon Specialissima RC frame with full SRAM RED eTap AXS 2x12 wireless groupset and integrated Quarq power meter. It pairs lightweight climbing performance with an integrated carbon aero cockpit and Reparto Corse carbon wheels; suited for racers and riders seeking a WorldTour-level climbing and all-round race bike.

Ultralight, aero-focused SuperSix EVO LAB71 built with Cannondale Series 0 carbon, Shimano Dura-Ace Di2 12-speed electronic shifting, and an integrated carbon SystemBar cockpit. Suited to racers and aggressive riders who want a lightweight, aerodynamic race bike with pro-level components.

The Caledonia-5 Dura-Ace Di2 is an endurance-focused carbon road bike with fully integrated routing, in-frame storage, and a high-end Shimano Dura-Ace R9250 12-speed electronic groupset. It pairs a compliant rear triangle with a stiff front end and Reserve 42/49 carbon wheels, suited for long fast rides and riders who want race-capable performance with comfort for all-day events.

Race-focused aero road bike with 500 Series OCLV carbon frame, tubeless-ready Bontrager carbon wheels, and a 12-speed SRAM Red AXS wireless drivetrain for precise shifting. Suited to competitive riders who want a lightweight, aerodynamic bike for fast road racing and aggressive training.

A lightweight race-oriented road bike with an advanced composite frame, full electronic Shimano Ultegra Di2 12-speed groupset, integrated aerodynamic cockpit and tubeless-ready 700C wheelset. Suits racers and riders seeking a high-performance climbing and all-round race machine with modern integration and hydraulic disc brakes.