GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Geo Metro, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Metro shoes against the drum. Available in new and remanufactured options for your Metro, every cylinder is bored to OEM specifications
The drum brake wheel cylinder on the Geo Metro is the hydraulic component that actuates your Metro drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Metro wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Geo Metro. A leaking Metro wheel cylinder actively bleeds hydraulic pressure from the brake circuit and contaminates the brake shoes with fluid, both of which directly compromise your ability to stop the Geo Metro.
Geo Metro drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Metro, attacking the cylinder bore surface. Once the Geo Metro bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Metro cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Metro wheel cylinder replacement on the same service interval as brake shoes.
GeoBrakes stocks both new OEM-specification wheel cylinders and quality remanufactured units for the Geo Metro. New cylinders are the stronger choice for Metro vehicles in high-corrosion environments. Remanufactured units offer excellent value for Geo Metro vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Metro cylinder, right bore diameter, port location, and mounting configuration, for your Metro drum brake assembly before purchase.
Can I drive my Geo Metro with a leaking wheel cylinder?
No. A leaking Metro cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Geo Metro over time. Brake fluid that reaches the Metro shoes renders the friction material ineffective. A leaking Geo Metro wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Geo Metro at the same time?
Yes. If one Metro cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Geo Metro has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Metro and avoids a second service call within months.
Do I need to bleed the brakes on my Geo Metro after replacing a wheel cylinder?
Yes. Replacing a Metro wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Geo Metro, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Metro.