Rear Drive Axles

  • BRIST rear drive axles are categorized under 3 main sub-categories as “Z-Drive” type, “Hypoid 90” type and “Inverted Portal” type

Rear Drive Axles– Z Drive

  • BRIST Z-Drive is a unique configuration specifically developed for buses with the engine installed in transversal layout to shorten rear overhang, which brings optimized seat configuration and optimized weight for the bus
  • Z-Drive axle is supplied with its Angle Drive Unit at the same input flange angle (35°)
Type Axle Load Max
(kgf)
Wheel Travel
(mm)
Axle Gear Ratio Diff. Offset* Tire Size Max Suspension Type Axle Weight
(w/o Oil)
Wheel Size
(mm)
RDA 65-175/A35 6,500 ± 85 4.45:1 73 245/75 R17.5″ Air/leaf spring suspension
2 bellows
412 kg
as bare
17.5×6.75
Bolt Circle 205
RDA 65-175/A35 6,500 ± 85 4.45:1 192 245/75 R17.5″ Air suspension
4 bellows
469 kg as bare
600 kg as fully dressed
17.5×6.75
Bolt Circle 205
RDA 65-195/A35 6,500 ± 85 4.45:1
3.81:1
192 225/70 R19.5″ Air suspension
4 bellows
469 kg as bare
600 kg as fully dressed
19.5×6.75
Bolt Circle 275
RDA 65-175/A35
Axle Load Max 6,500 kgf
Wheel Travel ± 85 mm
Axle Gear Ratio 4.45:1
Diff. Offset 73 mm outboarded to RH side
Tire Size Max 245/75 R17.5″
Suspension Type Air/leaf spring suspension 2 bellows
Axle Weight (w/o Oil) 412 kg as bare
Wheel Size 17.5″x6.75″
Bolt Circle 205 mm
RDA 65-175/A35
Axle Load Max 6,500 kgf
Wheel Travel ± 85 mm
Axle Gear Ratio 4.45:1
Diff. Offset 192 mm outboarded to RH side
Tire Size Max 245/75 R17.5″
Suspension Type Air suspension 4 bellows
Axle Weight (w/o Oil) 469 kg as bare 600 kg as fully dressed
Wheel Size 17.5″x6.75″
Bolt Circle 205 mm
RDA 65-195/A35
Axle Load Max 6,500 kgf
Wheel Travel ± 85 mm
Axle Gear Ratio 4.45:1
3.85:1
Diff. Offset 192 mm outboarded to RH side
Tire Size Max 225/70 R19.5″
Suspension Type Air suspension 4 bellows
Axle Weight (w/o Oil) 469 kg as bare 600 kg as fully dressed
Wheel Size 19.5″x6.75″
Bolt Circle 275 mm
  • Specifications of the Angle Drive unit at 35° input flange angle are shown at the table below
Type Max Engine Power
(kW)
Max Input Speed
(rpm)
Max Input Torque
(Nm)
Gear Ratio Weight w/o Oil
(kg)
Oil Capacity
(l)
ADU 65/A35 150 4,500 4,590 0.967:1 64 3.0
ADU 65/A35
Max Engine Power 150 kW
Max Input Speed 4,500 rpm
Max Input Torque 4,590 Nm
Gear Ratio 0.967:1
Weight w/o Oil 64 kg
Oil Capacity 3.0 l

Rear Drive Axles Hypoid 90°

  • BRIST rear drive axle 90° might be used in both rear and front engine options
  • This axle can also be supplied as fully dressed with suspension (half leaf-spring integrated with single air-spring)
Type Axle Load Max
(kgf)
Output Torque
Max
(Nm)
Tilting Angle Diff. Input
Angle
Axle Gear
Ratio
Axle Weight
w/o Oil
(kg)
Tire Size Max Wheel Size
(mm)
RDA 65-175/A90 6,550 3.5° 90° 5.29:1 711 215/75 R17.5″ twin 17.5×6.00″
Bolt circle 205
RDA 65-175/A90 6,550 90° 4.56:1 678 205/75 R17.5″ twin 17.5×6.00″(offset)
Bolt circle 245
RDA 65-175/A90
Axle Load Max 6,550 kgf
Output torque Max
Tilting Angle 3.5°
Diff. Input Angle 90°
Axle Gear Ratio 5.29:1
Axle Weight (w/o Oil) 711 kg
Tire Size Max 215/75 R17.5″ twin
Wheel Size 17.5×6.00″ Bolt circle 205 mm
RDA 175/A90
Axle Load Max 6,550 kgf
Output torque Max
Tilting Angle
Diff. Input Angle 90°
Axle Gear Ratio 4.56:1
Axle Weight (w/o Oil) 678 kg
Tire Size Max 205/75 R17.5″ twin
Wheel Size 17.5×6.00″(offset)
Bolt circle 245 mm
*outboarded to RH side

Rear Drive Axles– Inverted Portal

  • Inverted Rear Portal Axle has been engineered specifically for mid-size LF buses, offers max corridor width, higher ground clearance provided with radial brakes, compact dimension in height and less system weight with 10.4t loading capacity
  • BRIST Inverted Portal Axles are available at 75°, 80° and 90° input shaft angle
Type Axle Load Max
(kgf)
Output Torque
Max
(Nm)
Tilting Angle Diff. Input
Angle
Axle Gear
Ratio
Axle Weight
w/o Oil
(kg)
Tire Size Max Wheel Size
(mm)
BRA104-195 DC/A75 10,400 35,000 75° 4.86:1 711 265/70 R19.5″ twin 19.5″x7.5″
Bolt Circle 275
BRA104-195 DC/A80 10,400 35,000 80° 4.86:1 711 265/70 R19.5″ twin 19.5″x7.5″
Bolt Circle 275
BRA104-195 DC/A90 10,400 35,000 90° 5.87:1 711 265/70 R19.5″ twin 19.5″x7.5″
Bolt Circle 275
BRA104-195 DC/A75
Axle Load Max 10,400 kgf
Output torque Max 35,000 Nm
Tilting Angle
Diff. Input Angle 75°
Axle Gear Ratio 4.86:1
Axle Weight (w/o Oil) 711 kg
Tire Size Max 265/70 R19.5″ twin
Wheel Size 19.5″x7.5″
Bolt Circle 275 mm
BRA 104-195 DC/A80
Axle Load Max 10,400 kgf
Output torque Max 35,000 Nm
Tilting Angle
Diff. Input Angle 80°
Axle Gear Ratio 4.86:1
Axle Weight (w/o Oil) 711 kg
Tire Size Max 265/70 R19.5″ twin
Wheel Size 19.5″x7.5″
Bolt Circle 275 mm
BRA104-195 DC/A90
Axle Load Max 10,400 kgf
Output torque Max 35,000 Nm
Tilting Angle
Diff. Input Angle 90°
Axle Gear Ratio 5.87:1
Axle Weight (w/o Oil) 711 kg
Tire Size Max 265/70 R19.5″ twin
Wheel Size 19.5″x7.5″
Bolt Circle 275 mm