Shimano DURA-ACE Di2 ST-R9270 + BR-R9270 — 12-Speed ​​Hydraulic Disc Brake & Dual-Control (Right)

Designed for professional road racers. Fastest gear changes, unparalleled brake control and seamless integration.

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Why this set?

The Dura-Ace R92xx series is the pinnacle of Shimano's "scientific" approach to speed. The ST-R9270 + BR-R9270 set combines the comfort of wireless Di2 shifting, hydraulic brake control enhanced with SERVO WAVE, and premium material technologies to give you an advantage in every second of the race. It's aerodynamic, lightweight, quiet, and reliable — in short, it's built to push the boundaries of performance.

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Key benefits — at a glance

• The world's fastest, most reliable gear changes (ultra-low latency with Di2 wireless chip).

• SERVO WAVE hydraulic brake technology provides unparalleled brake modulation and control.

• Monobloc BR-R9270 caliper: lightweight, wider pad spacing, less noise, high heat dissipation.

• Prefilled SM-BH90-JK-SSR hose: filled with mineral oil at the caliper, ready for installation (1700 mm, can be shortened).

• Full customization with E-TUBE: gear speed, semi/full sync mode, button assignments, and firmware updates.

• Easy maintenance: one-way bleeding system and clean cable management.

• Lightweight, durable, aerodynamic design (CFRP fuselage + carbon coated arms).

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Technical Specifications

• Set: ST-R9270 (Right Dual-Control) + BR-R9270 (Hydraulic 2-piston caliper, Flat-Mount)

• Usage: Road / Racing

• Gear compatibility (STI): Rear — 12-speed (Di2 wireless supported)

• Di2 Wireless Chip: Yes (low interference, high speed, low power consumption)

• Battery efficiency (STI): High energy efficiency (e.g., long usage times with CR1632 button batteries)

• Number of e-Tube ports (ST-R9270): 2 (wired connection and firmware update compatibility)

• Compatible cable: EW-SD300 (recommended) / EW-SD300-I

• Brake type: Hydraulic disc, Flat-Mount

• Hose: SM-BH90-JK-SSR 1700 mm (comes pre-assembled with caliper, filled with mineral oil; can be shortened if needed)

• Brake pads (in box): L03A (Resin) with fin (cooling)

• Bleeding: One-Way (easy and clean bleeding procedure)

• Recommended rotor: SM-RT900 (140 / 160 mm recommended; maximum cooling with lightweight Freeza technology)

• Hose connection type: standard Shimano mineral-oil connections (olive/insert set may be required)

• Brake fluid: Shimano Mineral Oil

• Handlebar diameter compatibility: 23.8 mm / 24.2 mm (standard road bar)

• Handle material: CFRP body, carbon coated handles

• Caliper material: Aluminum monoblock

• Color: Series colors (black/gray tones)

• Mounting: Flat-mount (installer screws / 38 mm screws included in the box)

• Box contents (what comes with the package):

  • 1 x ST-R9270 (right Dual-Control)

  • 1 x BR-R9270 Flat-Mount 2-piston caliper (with pre-filled hose)

  • 1 x SM-BH90-JK-SSR 1700mm hose (pre-filled)

  • 1 x L03A-Resin pad set (with fin)

  • 2 x brake caliper screws (38 mm)

  • 1 x Tube Joint Kit

  • (Note: Rotor not included — the recommended SM-RT900 rotor is sold separately.)

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Technologies — why are they revolutionary?

SEIS (Shimano Electronic Intelligent System)

Shimano's precision, developed and proven over the years, is now electronic. SEIS delivers millisecond-in-millisecond shifting , ensuring consistent performance regardless of dirty/stretched cables or adverse weather conditions.

E-TUBE Platform

• Personalization: Gear speed, full/semi-synchronous mode, button assignments.

• Update & diagnostics: Firmware update and troubleshooting via SM-PCE1/PC connection.

• Power & signal: “Plug & Play” interactive connection; less cable clutter.

Di2 Wireless Chip

• Secure, low-interference wireless protocol

• Low latency, low energy consumption.

• Simple operation + clean handlebar look (reduced wiring)

SERVO WAVE Brake Technology

• Faster brake pad-disc contact (responds quickly to main pedal movement)

• Good modulation: precise stopping power at light pressure, strong stopping power at hard pressure.

• It improves driving safety, especially during races/descents and when using technical braking.

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Assembly and compatibility notes

• Mounting type: Directly compatible with flat-mount frames. For frames requiring an adapter, a suitable flat-mount adapter must be used.

• Rotor selection: SM-RT900 series or a combination with Ultegra/RT-CL series is recommended. 140 or 160 mm rotors are ideal; for long descents, 160/160 or 160/180 combinations can be considered.

• Hose cutting: The 1700 mm hose included in the box is generally suitable for most road bikes; if necessary, it can be cut and re-tightened with an olive/insert tool. (Follow Shimano service instructions for assembly.)

• Brake fluid: Use only Shimano Mineral Oil . Do not use DOT oil.

• Bleeding procedure: Routine care and bleeding are easy thanks to the One-Way bleeding procedure. (Authorized service recommended.)

• Electrical connection: ST-R9270 — rear derailleur/BT-DI2 network connection to E-Tube EW-SD300 via cable or wireless combination. A battery is required for the full Di2 system (BT-D series).

• Single-sided set: This package includes the right (R) Dual-Control + BR-R9270 caliper . The left arm/set includes the ST-R9270-L and associated caliper/hose sets, which must be purchased separately.

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Performance & How Does it Feel While Driving?

• Instant control: Safer, more precise stopping during braking. Superb modulation even at slow speeds.

• Sprints and shifts: Seamless, millisecond-precise gear changes thanks to the wireless speed of the Di2 and the ergonomics of the ST-R9270.

• Long descents: The BR-R9270 monoblock construction and advanced cooling reduce the risk of heat-induced fade — your brakes will always feel reliable.

• Clean setup: Minimal cables, clean handlebars, race-ready aesthetics.

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Who is it ideal for?

• World-class racers, triathletes, and amateur/professional drivers seeking maximum performance.

• For anyone who wants the best brake/shift integration, reliability, and customizability.

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Frequently asked questions, short answers.

• Is the rotor included? No — the rotor (SM-RT900 etc.) is sold separately.

• Is the hose already filled? Yes — the caliper is filled with mineral oil, the hose is ready for assembly.

• Is bleeding difficult? No — One-Way bleeding provides easy and clean maintenance; however, authorized service is recommended.

• Does Wireless Di2 require it? It includes the ST-R9270 wireless chip; a Di2 network and battery are required for full functionality.

• Is the left arm set included? No — this package is for the right (R) set; add the left arm separately for a complete pair set.

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Every second makes a difference in the race. Elevate your brake control and shifting precision to the next level with the ST-R9270 + BR-R9270 set. If you don't want to compromise on performance, this set offers the technology to get you to the podium.

If you'd like, I can check stock availability right away and also provide a price for the necessary adapter/hose length for assembly or the complete kit package including the left arm. Let me help you right away — it's race time! 🏁