Hayes Dominion T-Series Brake Lever

This lever is specifically engineered for the Dominion T-Series hydraulic system. While it may physically connect to other Dominion calipers, it is optimized for the T-Series performance standards and we recommend sticking to the intended series for the best modulation and feel.

Yes, this is a complete lever assembly. It includes the master cylinder and lever blade, ready to be installed and bled into your existing hydraulic line.

Yes, this lever is designed for the industry-standard 22.2 mm handlebar diameter, which covers the vast majority of modern mountain bike cockpits.

Absolutely. Because you are disconnecting the hydraulic line to swap the lever, you will need to perform a full system bleed to remove air and ensure the lever provides the correct pressure and stopping power.

No, this specific part is designed exclusively for the right-hand side. The reservoir orientation and lever ergonomics are side-specific, so it cannot be flipped to function as a left-hand lever.