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SRAM S-900 Aero HRD Disc Brake

Unconditional braking for unconditional riders.

For aero disciplines, hydraulic disc brakes can reveal a whole new world of speed savings. Less time slowing down means more time going fast. Better brakes mean faster splits, thanks to confidence-inspiring brake performance. Hydraulic aero brakes 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.

Features and Benefits

  • Optimized power and modulation for triathlon and time trial
  • New aero-specific hydraulic brake platform, HydroT, offers superior control, feel, and heat management
  • Textured carbon brake lever for better finger grip
  • Reach Adjust allows for custom brake lever fit
  • Stealth-a-majig™ connector makes initial setup fast and convenient
  • Bleeding Edge™ technology for quick, hassle-free bleeds

Things to Remember

  • Flat mount only
  • Either 160mm or 140mm CenterLine X rotors are recommended for triathlon and time trial
Alternate views

USD: $261
Euro: €277
Euro MSRP includes VAT

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Some variations of this product featured on this page are not available for purchase and are installed on bicycles as original equipment only. See your dealer for details.

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Specifications for SRAM S-900 Aero HRD Disc Brake

Lever MaterialCarbon LFRT (long fiber reinforced thermoplastic)
Caliper DesignMonoblock
FinishBlack Anodized
Rotor2-piece CLX 140 or 160
PadSteel-backed organic
FluidDOT 5.1
MountFlat mount 0 or 20mm offset
AdjustmentTooled reach adjust
Technology Highlight(s)HydroT
MaterialForged aluminum, carbon LFRT
Intended UseTriathlon, TT
Rotor Sizes140mm, 160mm
Tool-Free Pad ReplacementYes
Stainless HardwareTi and stainless
Retail AvailabilitySeptember 2017


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.

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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.

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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.

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Documents Available for SRAM S-900 Aero HRD Disc Brake

See more documents available for SRAM Road products.

SRAM Warranty (2.19 MB, PDF) - 28 Pages

Languages covered: EN, DE, ES, FR, IT, NL, PT, JA, ZH, PL, DA, CS, EL, RO, FI, SV, GA, BG, MT, SK, SL, HU, ET, LV, LT, KO, RU
Updated June 16, 2015