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Brake Actuation

Trusted brake actuation technology available in multiple variants comprised of double diaphragm spring brake chambers and piston type spring brake chambers.




Spring Brake Chambers

Spring brake chambers for air disc and drum brakes feature fully sealed parking chamber with internal breathing valve, coil clash-free design, and redundant sealing. TRISTOP is a piston-type spring chamber and TRISTOP D is a double diaphragm spring chamber.

Internal Breathing Valve (IBV) provides clean, dry air to maximize protection against exterior contamination, helping to eliminate corrosion

Powder coating protects the spring from corrosive environments

Coil-clash free spring prevents spring from rubbing against itself when engaged


Automatic Slack Adjuster

An automatic slack adjuster that ensures the correct transmission of power from the actuator to the drum brake S-cam shaft.

Routine maintenance-free due to lifetime lubrication and sealing design

Powder coating provides exceptional corrosion protection

Sealed design prevents ingress of contaminants

Lower risk of hot runners due to lower and more stable adjustments


EasyFit™ Automatic Slack Adjuster​

EasyFit Automatic Slack Adjuster aftermarket kits are available for many truck and trailer applications. Download the brochure for more information.

Related products

WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Get in touch

  • Get in touch with us

    Call us at 855-228-3203 or email us at wnacustomercare@wabco-auto.com