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SRAM S-900 Aero HRD Hydraulic Disc Brake - Flat Mount - rear

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Description of SRAM S-900 Aero HRD Hydraulic Disc Brake - Flat Mount - rear

For aero disciplines, hydraulic disc brakes can reveal a whole new world of speed savings. Less time slowing down is more time going fast. Better brakes mean faster splits, thanks to confidence-inspiring brake performance. Hydraulic road disc brakes (HRD) also allow for more aerodynamic frame designs, lower hand effort, shorter braking distances, and easier changes between wheelsets. SRAM Aero HRD is unconditional braking for unconditional riders.

  • Optimized power and modulation for triathlon and time trial
  • HydroT brake platform offers superior control, feel, and heat management
  • Textured carbon brake lever for better finger grip
  • Reach Adjust allows for custom fit
  • Stealth-a-majig™ connector makes initial setup fast and convenient
  • Bleeding Edge™ technology for quick, hassle-free bleeds
  • Either 160mm or 140mm CenterLine X rotors are recommended for triathlon and time trial


Stealth-a-majig™ is the coupling that makes initial setup of hydraulic systems fast and convenient. Its smaller size allows for easier internal cable routing, giving bikes a clean look.


Longer brake levers, independent reach adjust for the brake and shift levers, and optimized hood shape give riders of any size comfort and easy access to the controls.

Bleeding Edge™

Bleeding Edge™ technology makes bleeding brakes quick and simple. An updated fluid path and bleed porting make it easier to push fluid through the caliper. A dedicated bleed adapter plugs into the bleed port and seals the system to minimize air contamination and fluid loss.

Reach Adjust

Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone.
Brake caliper: Flat Mount
Brake fluid: DOT 5.1
Brake hose: 2000 mm
Braking pads: steel-backed organic
Disc: brake disc not included in delivery!
Included in delivery: Hydraulic brake lever, brake hose & brake caliper
without brake disc, without adaptor
Manufacturer item code: 00.5018.115.001
Material: Brake lever: carbon
brake caliper: aluminium
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Fact Sheet of SRAM S-900 Aero HRD Hydraulic Disc Brake - Flat Mount - rear

Product Name: SRAM S-900 Aero HRD Hydraulic Disc Brake - Flat Mount - rear
Manufacturer: SRAM
Item Code: SRA334740
activity: Bike, Triathlon
usage bikesport: Road Bike, Triathlon
brake actuation: hydraulic
disc brake version: Rear Wheel
disc brake spare parts: Levers
brake caliper: Flatmount
Model year: 2021
Color: Black
manufacturer item code: 00.5018.115.001
Manufacturer page:
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