Shimano Dura-Ace BR-R9270 + Di2 ST-R9180 Disc Brake

The Shimano Dura-Ace TT disc brake with ST-R9180 Di2 bar ends shifter/brake lever and BR-R9270 brake caliper

This disc brake from Shimano's top racing bike group Dura-Ace is designed for use in time trial competitions. It consists of the ST-R9180 electronic hydraulic shift/brake lever for handlebar end mounting and the BR-R9270 flat mount brake caliper.

The ST-R9180 triathlon and time trial Dual Control lever is originally part of the Dura-Ace R9100 2x11-speed groupset, but can be reprogrammed to 2x12-speed using the E-Tube platform. It shifts electronically by cable and brakes hydraulically. The cassette is easy to shift up and down using the easily accessible button on the inside, while the Shimano Synchro Shift function automatically coordinates the rear and front derailleurs. Note that the model is only compatible with the older EW-SD50 power cable, so you will need the EW-AD305 conversion adapter to connect to the Dura-Ace R9200 group components. ST-R9180 is suitable for handlebars that have an inner diameter of 19 to 22.5 mm and are made of aluminium or have aluminium inserts. The grip width can be adjusted with the help of a 2 mm hex wrench. The lever is made of lightweight aluminium and carbon. It is features the Multi Shift function for shifting through any number of gears with programmable shifting speed.

The BR-R9270 Dura-Ace caliper is a one-piece Mono-Body design. Compared to the Ultegra version, this saves over 20 grams of weight at the rear and front and increases the stiffness even more. The brake pads have more free space than in the previous model, which prevents grinding of the brake rotor and reduces noise. The braking power of the two plastic pistons is tuned for competition use. In addition, the BR-R9270 earns points with a simple bleed process thanks to One-Way Bleeding technology.

The Dura-Ace TT disc brake comes with a brake hose and with Ice-Tech resin pads, which ensure particularly good heat dissipation due to their cooling fins. However, you can also ride with them using conventional pads.

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of batteries and electrical equipment can be found here.

Specifications:

Series:

Dura-Ace R9200

Application:

Triathlon & Time Trial

Gearing:

2x, 11-/12-speed

Shifting System:

electronic

Type:

hydraulic, 2 pistons

Actuation:

mineral oil

Hose:

SM-BH90-JK-SSR

Hose Length (Front/Rear):

1000 mm / 1700 mm

Technical Information - Shift/Brake Lever:

Brake Lever Material:

carbon (CFRP)

Lever Body Material:

aluminium

Mount:

bar ends

Handlebar Inner Diameter:

19.0 - 22.5 mm

Reach Adjust:

bolt

Adjustment Options:

Reach Adjust

Technical Information - Caliper:

Mount:

flat mount

Pads:

resin with cooling fins

Design:

Mono-Body

Calliper Material:

aluminium

Piston Material:

resin

Hose Connection:

straight

Compatibility:

Shift/Brake Lever:

Mounting Position:

left for front brake caliper, right for rear brake caliper

Handlebar Type:

carbon handlebars with aluminium inserts at the brake lever mounting points, aluminium handlebars

Outer Handlebar Diameter:

22.2 - 24.0 mm

Power Cable:

EW-SD50 (1 x connection)

Rear Derailleur:

• 11-speed: RD-R9150, RD-R8050, RD-9070, RD-6870, RD-RX805, RD-RX815, RD-RX817
• 12-speed: RD-R9250*, RD-R8150*, RD-R7150*

Front Derailleur:

• 2x11-speed: FD-R9150, FD-R8050, FD-9070, FD-6870, FD-RX815
• 2x12-speed: FD-R9250*, FD-R8150*, FD-R7150*

Crank:

• 2x11-speed: FC-R9100, FC-R9100-P, FC-R8000, FC-R7000, FC-RS510, FC-9000, FC-6800, FC-5800, FC-RS500, FC-U5000-2, FC-RX810-2, FC-RX600-11
• 2x12-speed: FC-R9200, FC-R9200-P, FC-R8100, FC-R8100-P, FC-R7100, FC-RS520

Cassette:

• 11-speed: CS-R9100, CS-9000, CS-6800, CS-5800, CS-R8000, CS-HG800-11, CS-R7000, CS-HG700-11, CS-M8000-11, CS-M7000-11, CS-M5100-11
• 12-speed: CS-R9200-12, CS-R8100-12, CS-R8101-12, CS-R7100-12, CS-R7101-12, CS-HG710-12

Chain:

• 11-speed: CN-9000, CN-6800, CN-HG901-11, CN-HG701-11, CN-HG601-11, CN-LG500
• 12-speed: CN-M9100, CN-M8100, CN-M7100, CN-M6100

Additional Brake Lever:

BL-RX812

Satellite Shifter:

SW-R9150, SW-R9160

* Conversion adapter EW-AD305 required

Brake Caliper:

Brake Rotor:

140 mm, 160 mm (recommended: RT-MT900)

Pads:

organic and sintered; with narrow pad shape; standard and Ice Tech brake pads

Features:

Shift/Brake Lever:

• improved aerodynamics and optimised grip feeling
• no hand lifting needed thanks to integrated button on the inside
• intuitive shift control thanks to Shimano Synchronised Shift
• programmable gearing
• better modulation and greater confidence in racing conditions
• Multi Shift function adaptable to the respective riding style
• tidy cockpit thanks to internal routing with EW-RS910 and EW-JC130 contact points
• E-Tube project ensures firmware updates
• straight hose connection
• funnel bleeding
• painted lever

Brake Caliper:

• one-piece construction for maximum stiffness and lower weight
• 10% larger brake pad spacing minimises grinding of the brake rotor, less noise development
• braking performance optimally tuned for road use
• coherent appearance and easy tool access thanks to flat mount
• optimised heat dissipation with Ice-Tech
• simple bleeding process
• 2 pistons made of synthetic resin
• anodised
• steel bolts (4 mm)

Technology:

STI Dual Control
Shimano Total Integration (STI) means the combination of braking and shifting functions in one lever, which increases safety when riding. By refining the technology, it became possible to make shifting so smooth at the front and rear that they can be triggered with just one finger. Shimano calls such levers Dual Control Levers (DCL).

Digital Integrated Intelligence (Di2)
Di2 systems are the electronic shifting systems from Shimano. They are based on the SEIS, the Shimano Electronic Intelligent System, which takes over the index shifting function from the mechanical components, only via power cables or radio signals and not via a Bowden cable. Shifting is done by simply pressing a button. This has the advantage that no great effort is required, your concentration on the ride is not disturbed and operation is easy even with cold hands. In addition, the electronic gear changes are very fast and highly precise. There is also no risk of a defective circuit due to dirty cables or other problems. You can adjust individual settings via the E-Tube Project, such as adjusting the shifting speed, the number of shifting operations per button press or the Synchro or Semi-Synchro shifting function. Shimano offers an app for this purpose. Gear maintenance and firmware updates are also done via E-Tube, with the bike connected to a PC running the appropriate E-Tube software for more extensive workshop work.

One Way Bleeding
One Way Bleeding is a technique used on Shimano calipers that facilitates brake bleeding. The hose routing has been optimised so that no air bubbles remain in the brake calliper. In combination with the funnel, the brake can be bled cleanly and easily.

Manufacturer Numbers:

Front:

IR91802DLF6SC100

Rear:

IR91802DRRDSC170

Contents:

• 1 x Shimano Dura-Ace BR-R9270 + Dura-Ace Di2 ST-R9180 disc brake, front or rear
• 1 x Shimano SM-BH90-JK-SSR brake hose, 1000 mm (front) or 1700 mm (rear)
• 1 x pairs Shimano resin brake pads with cooling fins
• 1 x disc brake adapter for front wheel 140/160 mm (front only)
• 1 x cable connection set
• 2 x type A caliper bolts (front)
• 2 x caliper bolts for 25 mm frame diameters (rear)
• 1 x slider size S for 19 - 20.5 mm (mounted)
• 1 x slider size L for 20.5 - 22.5 mm
• ready for installation, filled, bleeding is recommended after installation

Order Together:

• FM to FM brake adapter SM-MA-R160 D/D for 160 mm brake rotor on 140 mm FM frame (for rear)
• EW-AD305 conversion adapter for connection to EW-SD300

Optional accessories:

• organic brake pads K05Ti-RX without cooling fins
• sintered brake pads K04Ti-MX without cooling fins
• sintered brake pads L04C-MF with cooling fins
• Type C bolts for 20 and 30 mm frame diameter
• Type C2 bolts for 20 and 30 mm frame diameter