Experience professional-grade sim racing with the MOZA R21 Ultra DD Wheel Base. Featuring a 21Nm sustained torque direct-drive motor, zero-cogging flat-wire technology, 21-bit magnetic encoder, and intelligent thermal management, the R21 delivers precise force feedback, smooth handling, and immersive realism for both endurance sessions and competitive racing.

 

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.

 

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

 

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

 

Specifications

Platform	PC
FFB Drive System	Direct Drive
Encoder Type	21-bit Magnetic Encoder
Encoder Resolution	2,097,152 PPR
Maximum Torque	21 N·m
Rated Power	360W
Input Voltage	110V~220V AC → 36V DC
Housing Material	Aluminum Alloy
Rear Cover Material	Plastic
Coupler Material	Aluminum Alloy
RGB Light Strips	2
Mobile App Functions	Supported
Quick Release	Supported
USB Refresh Rate	1000Hz
Ports	Power PC Pedals Dashboard Shifter Handbrake Emergency Stop Switch
Accessories	Power Adapter Data Cable Bolt Kit User Manual Warranty Card
Mounting Options	Front Side Bottom Optional adjustable bracket available
Emergency Stop Switch	Optional
Dimensions	248.8 × 140 × 135 mm
Weight	9.0 kg
Box Contents	R21 Ultra DD Wheelbase Power Adapter Power Cord Data Cord Bolt Kit