Transpeed Race Unit Tamiya 42157 - Transpeed BL 8.5T Brushless Motor for RC Cars [42157]

Tamiya 42157 - Transpeed BL 8.5T (12mm Rotor)

Price:

NZD$196.00

Brand:

Tamiya

Model:

42157

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Compact 12mm rotor for track-focused performance

The Tamiya 42157 Transpeed BL 8.5T (12mm Rotor) motor brings a compact, high-torque solution for circuit and club racing. The 12mm rotor is tuned to deliver reliable punch and predictable throttle feel that helps keep lap times tight.

Notable points about the Transpeed BL 8.5T

High Torque: The compact 12mm rotor concentrates torque where you need it for quick exits from corners.
Brushless Efficiency: Lower maintenance and longer service life compared with brushed motors.
Compatibility: Built to work with Tamiya Volac Brushless systems, including Item 42127 and Item 42144.
Advanced Performance: Favoured by experienced pilots who want precise speed control and consistent output.

Specifications

Motor Type: Brushless
Rotor Diameter: 12mm
Turns: 8.5T
RPM: 31680
KV Rating: 4400
Power: 292W
Efficiency: 93%

The Tamiya 42157 Transpeed BL 8.5T is a dependable choice for racers wanting compact torque and predictable performance, and its Volac compatibility makes it straightforward to pair with existing Tamiya brushless gear.

Will this motor fit small touring car mounts?

In most cases yes, but check your chassis motor mount and shaft spacing first. The 12mm rotor gives a compact overall package, but physical fit depends on your specific car.

Does it need a specific ESC?

It is compatible with Tamiya Volac Brushless ESCs such as Item 42127 and 42144. Other quality brushless ESCs will work provided they support the motor's RPM and current requirements.

How should I break it in?

Run a few short, moderate-power laps and let the motor cool between runs to seat bearings and brushes-free components. Avoid sustained full-throttle until the motor has settled in.

Any recommended gearing?

Gearing depends on track layout and battery voltage. Use conservative pinion sizes when tuning for torque, and step up teeth for top speed on fast circuits.

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