5:57Specifications
- Brake Disc Thickness
- 12 mm
- Outer Diameter
- 300 mm
- Thickness
- 68.5 mm
- Rim Hole Number
- 5
- Bolt Hole Circle Ø
- 120
- Surface
- Coated
- Brake Disc Type
- solid
- Fitting Position
- Rear Axle
- Weight
- 5.67 kg
Vehicle Manufacturers
BMW(3 items)
BMW
34 21 1 155 499
BMW
34 21 1 157 360
BMW
34 21 1 165 257
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5:57
12:32CDL Air Brakes Test 2024 (MOST Common Questions and Answers)
Driving Academy | CDL Truck Driving School
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14:21About this part
A brake disc (rotor) is the metal disc that the brake pads clamp onto to slow the wheel.
When the pads press against the spinning disc, friction converts the vehicle's motion into heat, which the disc dissipates; commercial vehicle discs are large and heat-resistant for high loads and repeated braking.
Mounted at the wheel as part of a disc brake. Because braking is safety critical, discs and pads are inspected on schedule and replaced by axle set by a qualified technician.
Frequently asked questions
Does 20 91 0754 have compatible (OE) part numbers?
Yes — it is linked to 3 OE-compatible part number(s), shown in the compatible parts section above.