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Disc or drum: choosing for tractor units and semi-trailers

It depends on vehicle type and load profile. Stock and prices on B2B or from a branch.

Brake disc, spare part (illustration)

Disc brakes cool faster; drums are still common on many semi-trailers and older models. The question is not “which is better” but what the vehicle manufacturer and the application call for.

In practice

  • Tractor unit front axle: disc on most newer models.
  • Semi-trailer: drums are still common; conversion is decided case by case.
  • No fitting without a matching part code and brand.

Order from our authorised Knorr-Bremse distributor stock on B2B. Technical questions: call your branch.

Frequently asked questions

Disc or drum?

The vehicle manufacturer and the application decide. Discs cool faster. Drums are common on many semi-trailers and older models.

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