The Shimano Dura-Ace ST-R9120-L brings flagship-level hydraulic braking and precise mechanical front shifting into a single left-hand lever, delivering the ultimate in road performance for 2x11-speed disc brake setups. A shorter lever throw, extended reach adjustment, and refined ergonomics make every shift and brake application effortless, whether on the hoods or in the drops.

Highlights

• Shimano Dura-Ace R9100 series — top-tier road groupset quality
• Left lever: 2-speed front shifting (2×11-speed system)
• Hydraulic disc brake with Shimano mineral oil
• 24% reduction in main lever throw vs. previous generation
• Up to 14mm reach adjustment (factory preset at 10mm)
• Free stroke adjustment for personalised braking feel
• Servo Wave technology for powerful, progressive braking
• Carbon fibre lever blade — lightweight and stiff
• Textured rubber hood for confident grip in wet or dry conditions
• Funnel bleeding capability for clean, straightforward hydraulic maintenance

Precision Shifting

The ST-R9120-L integrates Shimano's refined mechanical cable actuation for front derailleur control. The main lever throw has been reduced by 24% compared to the previous generation, and the release lever throw reduced by 14%, resulting in faster, more accurate front shifts with less hand movement. Compatible with Shimano 11-speed road front derailleurs.

Hydraulic Braking

Shimano's hydraulic disc brake system delivers consistent, powerful stopping force regardless of weather conditions. Servo Wave technology provides a progressive feel with strong modulation, while independent reach and free stroke adjustments allow precise setup for different hand sizes and riding preferences. The lever uses Shimano mineral oil and pairs optimally with the BR-R9170 Dura-Ace hydraulic disc brake caliper.

Ergonomics & Construction

The lever body is constructed from a resin and steel composite with a carbon fibre blade for stiffness without excess weight. The textured rubber hood surface provides a secure, comfortable grip. The clamp band fits standard 23.8–24.2mm road handlebars. Shift cable housing uses OT-SP41 polymer-coated outer casing on the lever side.

Compatibility & Fit

• Groupset: Shimano Dura-Ace R9100
• System: 2×11-speed road (left lever, front shift only)
• Handlebar clamp: 23.8–24.2mm
• Recommended caliper: Shimano BR-R9170
• Hydraulic fluid: Shimano mineral oil
• Brake hose kit: SM-BH90-JK-SSR (straight joint, sold separately)
• Shift cable housing (lever side): OT-SP41 polymer-coated
• Sold individually — left lever only