Experience professional-grade sim racing with the MOZA R21 Ultra. 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.
 
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 Customisation
Designed with a compact, motorsport-inspired profile, the R21 looks as serious as it performs. Dual RGB light strips along the top edges offer 16.7 million colors and fully customisable 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 Nexgen 4.0 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.
 
Fully Customisable via MOZA Pit House Software
MOZA Pit House software gives racers total control over FFB behavior:
• Force Feedback Curves: Choose from preset profiles or create your own.
• Force Interpolation: Smooths out granular effects for finer detail in surface feedback.
• Advanced Tuning: Independently adjust spring, damper, and friction forces without affecting vibration or game-based effects—ideal for serious users who demand full tuning control.
 
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 offers exceptional structural integrity and torsional rigidity—essential for withstanding high-torque output—while keeping overall weight to a minimum.
 
Native Ecosystem Integration
Featuring dedicated ports for all major MOZA peripherals, the R21 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.
 
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.
 
 
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