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A rear brake caliper is a crucial component of a vehicle's braking system, responsible for clamping the brake pads against the brake rotor to create friction and slow down or stop the vehicle. Typically made from materials such as aluminum or cast iron, these calipers house the hydraulic piston that applies pressure to the pads. Rear brake calipers can be either fixed or floating, with floating calipers being more common in many vehicles due to their simpler design and lighter weight.
| Material | Aluminum or cast iron |
| Type | Fixed or floating |
| Piston diameter | Typically 38mm to 50mm |
| Weight | 1 to 3 kg |
| Finish | Painted or anodized |
When selecting a rear brake caliper, consider the vehicle make and model to ensure compatibility. It's important to specify the type of caliper needed (fixed or floating) and the piston diameter for optimal performance. Additionally, inquire about the material and finish, as these can affect durability and performance. If purchasing in bulk, specify the quantity required to receive accurate pricing and availability.
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Fixed calipers have pistons on both sides of the rotor, providing better stopping power, while floating calipers have a single piston and move to accommodate the brake pads.
Signs include uneven brake wear, leaking brake fluid, or a spongy brake pedal.
While it's possible, it's recommended to replace calipers in pairs for balanced braking performance.
Basic tools include a socket set, wrenches, and a brake caliper tool for compressing the piston.
Many aftermarket calipers meet or exceed OEM specifications, but it's essential to choose reputable brands.
It's advisable to inspect them during regular brake maintenance, typically every 20,000 to 30,000 miles.