Drum brake lining kits contain a pair of brake shoes with friction lining bonded or riveted to the metal shoe. The shoes press outwards against the inside of the brake drum to slow the wheel. Drum brakes are still used on the rear of many small and mid-size vehicles and on most light commercial vehicles.
When to replace
Drum brake shoes wear at a similar rate to disc pads but are inspected less frequently. Symptoms develop gradually.
- Squealing or grinding from the rear under braking
- Reduced braking force compared to the front axle
- Handbrake travel excessive or unable to hold the car on a slope
- Lining thickness below 1.5 mm at the thinnest point
- Cracking or contamination of the friction material
What to look for when buying
Shoes are sold as axle sets and must match the drum diameter, width, and orientation. Many vehicles have specific leading and trailing shoes that are not interchangeable.
- Match drum diameter — common sizes include 200 mm, 228 mm, and 254 mm
- Lining material — non-asbestos organic (NAO) is the modern standard; confirm asbestos-free certification
- Leading and trailing shoes have lining of different lengths — fit the correct shoe to each side
- Some kits include hold-down springs, return springs, and adjuster — useful for full refresh
- Confirm whether your vehicle uses self-adjusting or manual adjusters
Common failure modes
Drum brakes can fail through wear, contamination, and adjuster issues.
- Lining wear past minimum thickness or down to the rivet heads
- Brake fluid contamination from a leaking wheel cylinder
- Glazed lining from repeated handbrake application while moving
- Seized adjuster prevents shoe travel from being maintained
- Heat fatigue causing the lining to detach from the shoe
Related parts to check together
Open the drum is the right time to inspect the rest of the assembly.
- Brake drum — measure inside diameter; replace if above the wear limit stamped on the drum
- Wheel cylinder — check for fluid leak past the dust boots
- Brake adjuster — replace if seized or out of adjustment range
- Springs and hold-down kit — heat-cycled springs lose tension over time