Hayes Dominion T4 Disc Brake - Rear

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keyboard_arrow_right Description

The best just got better. The limited-edition Hayes Dominion T4 packs the power, sensitivity, and reliability the Dominion family is known for into its lightest chassis yet. Featuring a Reynolds designed and in-house produced carbon-fiber lever, titanium hardware, composite reservoir cover, pads with aluminum backing plates, and precise weight-reducing machining.


Low effort system with predictable, progressive ramp up and a crisp bite point.


Reduced Friction - A featherlight lever feel is acheived through a combination of an added glide ring on the piston and sealed ball bearings at the lever blade pivot.

SRL - Our Stable Rate Link delivers a consistent lever ratio regardless of reach.

Precise Engagement - Each Dominion is factory set to have the lowest dead stroke possible and a crisp bite point.

Built to last - Metal pistons are used to ensure that no matter the terrain or temperature your brake will continue to perform as it did on the first ride.

Adjustable Reach - Adjust your lever reach with ease while on the trail thanks to an intuive adjustment knob design.

FEA-optimized modal shapes of D-Series rotors are intentionally designed to oppose those of Semi-Met T106 and Sintered T100 pads, canceling out noise and vibration.

Crosshair Caliper Alignment screws allow for quick and accurate setup.

King Pin pad retention bolt adds strength.

2-Stroke dual port bleed system for maximum bleed integrity.


  • Tooled Reach Adjustment
  • Tooled Pad Contact Adjust
  • Axial Lever Orientation
  • K2 Hose
  • Crosshair Caliper Alignment
  • Composite lever & reservoir cover, titanium hardware


  • Weight: 257g (90cm hose & mount hardware)
  • Reach adjust: Tooled
  • Compatible Rotor (not included): D-series (160, 180, 203) w/ QuickBite² and MRC
  • Hose: Low expansion with Kevlar weave
  • Fluid: Hayes DOT 5.1
  • Bleed: Two Stroke
  • Caliper Piston Size: 17mm
  • Pad Material: T106 Semi-metallic, T100 Sintered metallic
  • Pad retention: KingPin
  • Pad Insertion: Bottom Load
  • Crosshair Alignment: yes
  • 2-piece Clamp: yes
  • Pad Contact Adjust: Tooled
  • Adjustable Banjo Connection: Yes
  • Flip-Flop Lever: Yes
  • Lever Pivot: Sealed Cartridge Bearings

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