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Hayes Disc Brakes | Dominion A Series Small Parts (A2/A4) - 1.1 Master Cylinder Assembly Kit (Black/Bronze)

Hayes Bicycle

4.5 (123)

Dominion A Series Small Parts (A2/A4)

Name: Hayes Bicycle Dominion A Series Small Parts (A2/A4) - Dominion A Series Small Parts (A2/A4)
Brand: Hayes Bicycle
SKU: 44068100309037
Price: 149.99 USD
Availability: InStock
Rating: 4 (1 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$149.99

Quantity

Color

Black

Quantity

Replacement small parts for Hayes Dominion A2 & A4. Reference exploded view for part number.

Reviews

4.0

2 ratings

a4 master cylinder

the brake is a great brake when you talk about stopping but the small parts screws and thread is so easy to be annihilated. I did torque mine for 1.2 nm but somehow still break it 😭

Michael · February 10, 2026