R21 Ultra DD Wheel Base

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Sustained 21Nm Torque Output

CNC-machined Aluminum Housing

21-bit

Magnetic Encoder

High-density

Flat-wire Motor

Ultra-low

Cogging Torque

600MHz High-performance CPU

Refined Design with RGB Customization

Cloud-based App Configuration

All-new Zero-cogging
Flat-wire Motor

The MOZA R21 is part of our latest flagship direct drive wheelbase line up, engineered for sim racers who demand top-tier performance. Featuring a 21Nm motor, aerospace-grade magnetic encoding, and MOZA's most advanced force feedback algorithm, the R21 delivers unparalleled realism, control, and responsiveness in any sim racing scenario.

Sustained 21Nm Torque Output

Powered by an industrial-grade motor engineered for durability and thermal efficiency, the R21 delivers a sustained 21Nm of torque without throttling—ideal for professional-grade sim racing and extended endurance sessions.

21-bit Magnetic Encoder

With a 21-bit high-resolution magnetic encoder, the R21 delivers over 2 million points of precision, capturing every steering input and surface detail with stunning accuracy. Connect with the road like never before.

Refined Design with RGB Customization

Designed with a compact, motorsport-inspired profile, the R21 Ultra looks as serious as it performs. Dual RGB light strips along the top edges offer 16.7 million colors and fully customizable lighting effects, including real-time telemetry feedback for ABS, traction control, gear shifts, and flag signals.

New Force Feedback Algorithm

The powerful R21 DD base pairs seamlessly with MOZA’s advanced New Force Feedback Algorithm, combining cutting-edge hardware and software. This synergy delivers more realistic force feedback and enables precise tuning tailored to every driving style.

iRacing 360Hz Mode

Delivers richer and more responsive force feedback.
Heightens immersion and driving precision.

*Available via MOZA Pit House after the May iRacing update.

FFB Interpolation Algorithm

Smooths out abrupt torque spikes and dips.
Ensures a more natural, progressive force curve under all conditions.

Game FFB Decoupling

Decomposes force feedback signals into individually adjustable components.
Fine-tune every detail to match your driving style—your wheel, your rules.

Custom Force Feedback Curve Tuning

Fully adjustable, non-linear output for precise handling.
Amplifies useful force cues while reducing distractions.
Helps drivers sense traction loss sooner, enhancing control and confidence.

Force Feedback Equalizer

Adaptive vibration control tailored to different driving scenarios.
Filters out unnecessary noise, delivering only the essential feedback.
Strikes the perfect balance between realism and clarity for an immersive racing experience.

Intelligent Thermal Management

The R21 features MOZA's fully upgraded intelligent cooling system providing ample motor headroom and optimized thermal efficiency, it runs cooler—even under sustained high torque. Real-time temperature monitoring and smart torque regulation work together to maintain peak performance through the most demanding racing sessions.

Versatile Mounting Options

Supports bottom, front, and side mounting to accommodate a wide range of rigs.

CNC-machined
Aluminum Housing

Constructed from a rigid die-cast aluminum unibody, the R21 Ultra offers exceptional structural integrity and torsional rigidity—essential for withstanding high-torque output—while keeping overall weight to a minimum.

Extreme Durability

Built for endurance and performance, MOZA's slip ring handles over 10 million rotations and transfers data at 2M/s, delivering solid connection and lag-free communication between the wheel and base.

Native Ecosystem Integration

Featuring dedicated ports for all major MOZA peripherals, the R21 Ultra keeps your setup clean and hassle-free—simply plug in pedals, shifters, dashboards, or a handbrake without the need for extra USB hubs or cables.

Hands-off Protection

This function can effectively avoid the risk of injury and quickly help restore control by detecting that hands are off the wheel. Once activated, it will quickly stop any oscillation and safely center the wheel.

Race Your Favorites

Seamlessly compatible with leading titles including Forza Horizon, Project CARS, DiRT Rally, Assetto Corsa, F1, and more, and dozens more. Jump in and experience the thrill across today’s most popular racing simulators.

Automobilista

Automobilista 2

BeamNG.Drive

Euro Truck Simulator 2

F1 2018

F1 2019

F1 2020

F1 2021

F1 22

F1 23

F1 24

F1 25

Forza Horizon 4 (Microsoft Store Edition)

Forza Horizon 5

Forza Motorsport

iRacing

KartKraft

Le Mans Ultimate

Live For Speed

MudRunner

Project CARS

Project CARS 2

Project CARS 3

RaceRoom Racing Experience

Richard Burns Rally

rFactor 2

WRC 9

WRC 10

WRC Generations

Wreckfest

American Truck Simulator

Specs

Dimensions

248.8 × 140 × 135 mm

Housing Material

Aluminum alloy

Rear Cover Material

Plastic

Coupler Material

Aluminum alloy

Encoder Type

21-bit magnetic encoder

Encoder Resolution

2,097,152 PPR

Maximum Torque

21Nm

RGB Light Strips

2

Mobile App Support

Yes

Quick Release

Supported

Ports

Power, PC, Pedals, Dashboard, Shifter, Handbrake, Emergency Stop Switch

Mounting Options

Bottom, front, and side mounting supported

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MOZA R21 Ultra DD Wheel Base

All-new Zero-cogging
Flat-wire Motor

Sustained 21Nm Torque Output

21-bit Magnetic Encoder

Refined Design with RGB Customization

New Force Feedback Algorithm

iRacing 360Hz Mode

FFB Interpolation Algorithm

Game FFB Decoupling

Custom Force Feedback Curve Tuning

Force Feedback Equalizer

Intelligent Thermal Management

Versatile Mounting Options

CNC-machined
Aluminum Housing

Extreme Durability

Native Ecosystem Integration

Hands-off Protection

Race Your Favorites

Specs

MOZA R21 Ultra DD Wheel Base

All-new Zero-cogging Flat-wire Motor

Sustained 21Nm Torque Output

21-bit Magnetic Encoder

Refined Design with RGB Customization

New Force Feedback Algorithm

iRacing 360Hz Mode

FFB Interpolation Algorithm

Game FFB Decoupling

Custom Force Feedback Curve Tuning

Force Feedback Equalizer

Intelligent Thermal Management

Versatile Mounting Options

CNC-machined Aluminum Housing

Extreme Durability

Native Ecosystem Integration

Hands-off Protection

Race Your Favorites

Specs

All-new Zero-cogging
Flat-wire Motor

CNC-machined
Aluminum Housing