2wd – BPA-2R S

The S series comes standard with knurled rollers which provides the highest traction between rollers and tires, a guarantee of an extremely high accuracy in measurement. Equipped by eddy current brake all power is directly transferred from the wheels to the load cell.
Especially designed for standard car workshops, test lanes; this series has lower performances than our HP (High Performance) Series, keeping the same accuracy and top level components, allowing to minimize test bench maintenance, over the years. All our 2wd models are upgradable to 4wd.


Standard features

4 big diameter rollers knurled over the entire width

Bapro is the sole to adopt the cut knurling that give the best grip to the tire

Pro: maximum precision, minimum slippage, avoid the tire overheat with less wear.

Eddy current brake with load cell

Allow to perform load tests and fixed rpm

Pro: the brake and the rollers are mounted in the same frame, that is conceived to withstand the power of the ultra high-power vehicles.

Pneumatic vehicle lifter with rollers lock

High quality pneumatic lifter

Pro: make easier the vehicle positioning on the road simulator by locking the rollers and lowering the step

Chassis dynamometer management software

Allow to perform, save, compare and print the tests

Pro: Updated, complete, particularly intuitive, with analogue and digital gauges. It works without mouse and by remote control. Compatible with the present and future Windows operating systems. It doesn’t need a dedicated computer and it works on the notebooks too!

Optional features

Roller Covers

Protect the rollers when the dynamometer is not working

Pro: Allow to gain place in the workshop.

Infrared remote control

Operating system free

Pro: allow to perform any tests without stopping the vehicle.

Personal Computer With 19″ Monitor And Printer

last generation operating system, big monitor

Pro: ready to use and checked with the dynamometer.

Computer Trolley

built by heavy duty lasting steel, house the computer, monitor, keyboard and printer

Pro: heavy duty, movable, wide working surfac

Lambda sensor input

Allow to connect the vehicle lambda probe or an external controller

Pro: Allow to compare the dynamometer readings with the vehicle carburetion. Invaluable during the tuning or the mapping.

Wide band lambda system

5 wires wide band lambda probe

Pro: Optimum data accuracy over the entire working range of the engine.

Aluminum Loading Ramps

High width aluminum ramps

Pro: lightweight, strong and in the same way give the optimal support to the tires when placing the vehicle on the chassis dynamometer.

Proportional ventilation speed control

Adjust the fan speed in function of the rollers speed

Pro: energy saving and more accurate road simulation.

Ventilation System Movable On Wheels

Target power 4,4 kW, flow rate 43.000 m3/h allow to cool every vehicle, the highest flow power for a dyno in the market!

Pro: perfect when the dynamometer is installed on floor, can be used a supplementary fan to cool down accessory, exhaust system, radiator….

Boost pressure

Boost pressure input 0÷2.5 bar relative pressure ± 0.035 bar error. (Requires outer meteo sensor box)


Maximum speed 330 km/h 350 km/h 360 km/h 360 km/h 220 km/h 250 km/h 250 km/h
Maximum adsorbable power 450 HP 500 HP 650 HP 1300 HP 800 CV 350 HP 700 HP
Maximum measurable power 500 HP 550 HP 1000 HP 2000 HP 900 CV 500 HP 1000 HP
Maximum traction force 5000 N 5000 N 8000 N 16000 N 900 CV
Mechanical features
Rollers diameter 400 mm 400 mm 400 mm 400 mm 400 mm 240 mm 240 mm
Rollers width 310 mm 310 mm 700 mm 700 mm 800 mm 660 mm 660 mm
Roller balancing grade Q 6.3 Q 6.3 Q 6.3 Q 6.3 Q 6.3
Equivalent base inertia 80 Kg 80 Kg 450 Kg 900 Kg 550 Kg
Dimensions 2560×1860 mm 2560×1860 mm 3470×1135 mm 3470×5345 mm 4650×1150 3.070 x 870 x 310 mm 3.130 x 4.870 x 360 mm
Deck height 410 mm 410 mm 410 mm 460 mm 640 mm
Weight 500 kg 500 kg 2500 kg 2500 kg 2000 kg 2000 kg
Voltage 220 V 50 Hz 220 V 50 Hz

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