The handbrake is a tool that increases the control you have over your car. As skills progress, most ditch the stock cable-actuated handbrake for a hydraulically actuated handbrake for more mechanical advantage. The two popular hydraulic handbrake configurations are inline and dual caliper.
Let’s explore the differences between the two configurations.
Inline Handbrake
An inline handbrake integrates into the vehicle's existing brake lines and calipers. It involves installing a hydraulic cylinder inline with the rear brake circuit. When the handbrake lever is pulled, hydraulic fluid is drawn from the foot pedal cylinder to the rear calipers.
Pros:
Cost: Installing an inline handbrake is generally more affordable. It utilizes the existing brake components, reducing the need for additional parts.
Simplicity: The installation process is easier. Fewer parts mean less planning.
Lighter: You don’t increase unsprung mass, which is beneficial for handling.
Cons:
Shared Brake System: The inline handbrake uses the same hydraulic circuit as the foot brake, which can lead to pressure changes in the system when the handbrake and the footbrake are actuated at the same time.
Stiffness: There is a longer length of lines in the brake circuit. Although small, this adds compliance to the circuit, translating to a slightly “spongier” feeling handbrake.
Dual Caliper Handbrake
A dual caliper handbrake system involves adding a completely separate brake circuit for the rear brakes. This setup includes a second set of brake calipers, lines, brake cylinder, and reservoir.
Pros:
Independent Operation: With a separate hydraulic system, the dual caliper handbrake provides consistent performance without affecting the primary brakes.
Cons:
Higher Cost and Complexity: Installing a dual caliper handbrake involves additional parts and labor, making it a more expensive option.
Weight: Adding parts to the rear end increases unsprung mass, which is more mass that the suspension needs to control.
Conclusion
Choosing between an inline handbrake and a dual caliper handbrake ultimately depends on your specific needs, budget, and level of expertise. If you're looking for a cost-effective and straightforward solution, an inline handbrake is the way to go. If you prioritize handle feel in all situations, a dual caliper handbrake could be worth the extra cost and effort.