These Shimano Dura-Ace ST-R9100 shifters are a pair of 11-speed brake and shift levers designed for road bikes with drop handlebars. They combine braking and shifting into a single unit, allowing riders to operate both functions without removing their hands from the bars. The ST-R9100 is compatible with Shimano 11-speed mechanical groupsets and is intended for use with rim brake road bikes, not hydraulic or disc brake systems. Each lever features a carbon fiber construction for reduced weight and improved stiffness, with a refined ergonomic shape and extended reach adjustment (20.8 mm) for comfort during long rides. The levers are sold as a pair and include both left and right units, making them suitable for riders upgrading or replacing their existing shifters on a compatible road bike. These shifters are ideal for cyclists who prefer mechanical shifting and want a reliable, lightweight option for road racing or endurance riding.

The ST-R9100 is a popular choice for those maintaining or restoring older Dura-Ace-equipped road bikes, or for riders who value the simplicity and reliability of mechanical shifting over electronic systems.