MOZA R21 Ultra Wheelbase
Get Started
 MOZA Pit House All-in-one control software |  MOZA Racing App Cloud-based mobile control |  User Manual Product features and guides |  Accessories Compatible accessories |
Post-Sales Support
 Contact Customer Support support@mozaracing.com |  Get Technical Support Submit New Ticket |  Request Repair Service Contact customer support first |
Specifications
Specification | Details |
Platform | PC |
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, and bottom mounting supported (optional adjustable bracket available) |
Emergency Stop Switch | Optional |
Dimensions | 248.8 × 140 × 135 mm |
Weight | 9.0 kg |
Tutorial Video
 Introduction |  Setting Guide for ACC |  Setting Guide for Le Mans Ultimate |  Setting Guide for F1 25 |
FAQ
Q: Is the R21 Ultra’s 21Nm torque sustained or peak output? What does that mean for me?
The R21 Ultra’s 21Nm rating refers to sustained torque, not a short-term peak. This means the base can maintain full performance even during long, demanding endurance sessions without torque throttling—ensuring consistent, realistic feedback every lap.
Q: How does 21Nm compare to other wheel bases on the market? Who is it for?
21Nm sits in the upper mid-range of direct drive wheel bases—stronger than most entry and mid-tier models (typically 3–17Nm) yet more accessible than extreme flagship units. It’s ideal for advanced sim racers or semi-professional drivers who demand sustained torque, precision, and smooth control for competitive racing.
Q: What’s the difference between the R21 and previous MOZA bases like the R5 or R9? Why should I upgrade?
The R21 Ultra introduces major upgrades over previous MOZA bases:
- Higher sustained torque at 21Nm for endurance performance;
- Next-gen zero-cogging flat-wire motor and 21-bit magnetic encoder for ultra-smooth precision;
- Intelligent cooling for stable thermal efficiency;
- Advanced force feedback algorithms and customizable app tuning for personalized feel and control.
Q: How is thermal performance and long-term durability? Are there safety features?
The R21 features intelligent thermal management with real-time temperature monitoring and torque regulation to maintain optimal performance. A built-in Hands-off Protection system automatically centers and stabilizes the wheel if your hands leave it—enhancing safety during use.
Q: Do the RGB lighting and app features affect performance? Can I turn them off?
No. The RGB lighting is purely aesthetic and telemetry-driven—it can be fully customized or turned off. The MOZA App handles configuration and firmware updates only; all critical force feedback processing is handled locally for zero performance loss.