Hayes Dominion A2 Disc Brake Caliper
Best reliable braking component for demanding cycling enthusiasts.
A reliable replacement caliper designed to restore high-performance stopping power to your existing hydraulic setup. It offers the same consistent modulation and durability expected from the series, providing a straightforward fix for worn or damaged components.
$119.99
at
Hitchhiker Bike Shop
More Dominion options
Who it's for
- Riders needing a direct replacement for their Dominion A2 brakes.
- Cyclists seeking to restore original stopping power and modulation.
- Budget-conscious riders looking for an efficient repair solution.
Who should skip it
- Riders considering upgrading or mixing brake components from different brands.
- DIY mechanics without advanced bike repair skills or specific tools.
- Users with significantly worn existing brake components.
Performance breakdown
Stopping Power
Two-piston architecture delivers confident, predictable bite for technical trail riding.
Modulation
Excellent lever feel allows for precise speed control in loose corners.
Build Quality
Robust construction withstands heavy abuse and harsh environmental conditions with ease.
Installation Ease
Standard post-mount design makes swapping or upgrading a straightforward process.
Heat Management
Efficient fluid handling prevents brake fade during long, sustained descents.
System Compatibility
Limited to Dominion A2 systems, restricting broader cross-brand component mixing.
Key Specs
Brake Type
Hydraulic Disc
Number of Pistons
2
Mount Type
Post Mount
Compatibility
Dominion A2 Hydraulic Systems
Pads Included
No
Compound
Sintered
Backing Plate Material
Steel
Weight
45.36 grams
Intended Use
Mountain Biking
Hydraulic Fluid Type
DOT 5.1
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