Holzknecht HRB stufenlos

New Holzknecht HRB Continuously Variable Retarder Brake from Holzknecht—the ideal solution for heavy tractor-trailer combinations!
This auxiliary brake, powered by the front PTO, ensures safe and fast downhill driving without causing wear. Technology that has been used in the trucking industry for decades is now available for your tractor.
It reduces the load on both the tractor and trailer brakes and protects against engine over-revving and brake overheating.
With continuously adjustable electromagnetic braking force across four preset levels, you’ll experience maximum control—a proven solution from the truck and tour bus industries!
- Radio-controlled operation
- ONLY a drive shaft is required—NO wiring, NO hydraulic connection, etc.!
- Drive shaft included!
- Proportional control
- 4 preselectable power levels: 80 / 120 / 200 / 300 PS
- 0–100% modulation in EVERY preselected level—ONE retarder for EVERY PS class!
- Additional weight up to 800 kg possible
- Integrated auxiliary headlights
- Max. braking force up to approx. 1,700 Nm
- Curb weight: 430 kg
Choose safety and efficiency! Testing or rental options are available!
We’d be happy to arrange a viewing—please make an appointment in advance so we can set aside time for a personal consultation.

New Holzknecht HRB Continuously Variable Retarder Brake from Holzknecht—the ideal solution for heavy tractor-trailer combinations! This auxiliary brake, powered by the front PTO, ensures safe and fast downhill driving without causing wear. Technology that has been used in the trucking industry for decades is now available for your tractor. It reduces the load on both the tractor and trailer brakes and protects against engine over-revving and brake overheating. With continuously adjustable electromagnetic braking force across four preset levels, you’ll experience maximum control—a proven solution from the truck and tour bus industries! - Radio-controlled operation - ONLY a drive shaft is required—NO wiring, NO hydraulic connection, etc.! - Drive shaft included! - Proportional control - 4 preselectable power levels: 80 / 120 / 200 / 300 PS - 0–100% modulation in EVERY preselected level—ONE retarder for EVERY PS class! - Additional weight up to 800 kg possible - Integrated auxiliary headlights - Max. braking force up to approx. 1,700 Nm - Curb weight: 430 kg Choose safety and efficiency! Testing or rental options are available! We’d be happy to arrange a viewing—please make an appointment in advance so we can set aside time for a personal consultation.

New Holzknecht HRB Continuously Variable Retarder Brake from Holzknecht—the ideal solution for heavy tractor-trailer combinations! This auxiliary brake, powered by the front PTO, ensures safe and fast downhill driving without causing wear. Technology that has been used in the trucking industry for decades is now available for your tractor. It reduces the load on both the tractor and trailer brakes and protects against engine over-revving and brake overheating. With continuously adjustable electromagnetic braking force across four preset levels, you’ll experience maximum control—a proven solution from the truck and tour bus industries! - Radio-controlled operation - ONLY a drive shaft is required—NO wiring, NO hydraulic connection, etc.! - Drive shaft included! - Proportional control - 4 preselectable power levels: 80 / 120 / 200 / 300 PS - 0–100% modulation in EVERY preselected level—ONE retarder for EVERY PS class! - Additional weight up to 800 kg possible - Integrated auxiliary headlights - Max. braking force up to approx. 1,700 Nm - Curb weight: 430 kg Choose safety and efficiency! Testing or rental options are available! We’d be happy to arrange a viewing—please make an appointment in advance so we can set aside time for a personal consultation.