Hayes Dominion T4

The T4 is the premium, lightweight iteration of the Dominion platform. It swaps standard components for a carbon fiber lever blade and titanium hardware, significantly reducing weight while maintaining the same powerful four-piston caliper architecture.

While they are technically capable, the T4 is engineered specifically for gravity disciplines like Enduro and Downhill. They offer more power and heat management than you would typically need for cross-country, making them overkill for lighter trail bikes.

The brakes come pre-bled for convenience, but you will likely need to shorten the hoses to fit your specific bike's cable routing. You should plan to perform a bleed after cutting the hoses to ensure the system remains free of air.

The T4 uses the same pad shape as the Dominion A4. You should look for Hayes Dominion-specific pads, which are widely available in both metallic and semi-metallic compounds depending on your preference for bite and longevity.

Yes, the T4 uses a standard post-mount interface. If you are currently using a different brand of brake, you may need to swap your existing adapters to ensure the caliper is correctly spaced for your specific rotor size.

The carbon lever blade is noticeably lighter and tends to feel slightly warmer to the touch in cold weather. It offers a very stiff, high-fidelity feel that provides excellent feedback, though it may be more prone to damage in a direct impact compared to aluminum.