Moza Racing MOZA R21 V3 Direct Drive - Rattbase for simracing - PC

With 21Nm of peak torque—30% more than similar models—the R21 V2 delivers ultra-precise, immersive racing powered by a carbon-slanted pole servo motor. A triple-staggered rotor design ensures smooth, vibration-free operation, while a 21-bit encoder and 280MHz processor capture every movement with accuracy. Wrapped in a sleek aluminum body and tuned via the MOZA Pit House App, it’s built for serious racers

R21 V2 Direct Drive Wheel Base
Carbon Precision. Relentless Power.

21Nm of Consistent Torque
With 21Nm of power behind the R21 and a carbon fiber slanted pole servo motor, feel everything modern racing cars have to offer. Every bump, slip, and slide is delivered with exceptional clarity and smoothness, for unbeatable, class-leading immersion.

Carbon Fiber Wrapped Rotor
Automotive-grade rotor protection.
Effectively suppresses eddy current losses.
Superior thermal management for sustained performance.

21-Bit Magnetic Encoder
With 280MHz High-Performance Processor
Divides each full rotation into 2,097,152 precise steps.
Delivers microscopic 0.00017° resolution.
Enables ultra-smooth control feel and instant response.
Reproduces exceptionally detailed force feedback.

High-Performance Slanted Pole Servo Motor
Race-grade Performance for Sim Racing

Innovative Segmented Rotor Design
Asymmetric segmented skew design Significantly reduces cogging torque & EM vibration Near-silent operation at all speeds

High Torque Density
Optimized slot-fill copper windings High-permeability silicon steel core NdFeB permanent magnets for maximum output

18-Slot/16-Pole Configuration
Multi-slot/pole design minimizes torque ripple. Enhanced damping for smoother feedback. Delivers precise and detailed steering response

Wide Torque Range
Low back-EMF design. Maintains consistent torque at high RPM. Eliminates abrupt torque drop-off

Six Unique Approaches to Direct Drive Design
Developed by experts in the electric motor field, the R21 motor utilizes 6 unique design approaches to ensure a smooth racing experience. V-shaped struts and fractional slot-concentrated windings are used to ensure maximum torque without notchiness. The R21 sports a 30% larger torque output than other similar models.

NexGen 4.0 Force Feedback Algorithm
Enhanced Dynamic Feedback
More refined and detailed force feedback.
Sharper, more defined curbs and rumble strip sensations.
Instant response to weight shifts and tire slip.
New cogging torque compensation for ultra-smooth steering.

Sturdy All-aluminum Body
The R21 is made of aluminum alloy, giving the base a rock-solid feel and weight.

Cloud-based Mobile App Control
Enjoy on-the-fly changes using the MOZA app! Force feedback, pedal settings, and more can all be changed in real-time. One-click importing allows easy hassle free setup transfers to new devices.