Description
The Moza R21 Ultra Direct Drive Wheelbase delivers a muscular 21Nm of sustained torque wrapped in a compact aluminum chassis that feels more like a piece of engineering equipment than gaming hardware. Its zero-cogging flat-wire motor produces seamless steering rotation that captures every nuance of road texture and weight transfer. Paired with MOZA’s refined Nexgen 4.0 force feedback algorithm, it transforms each lap into a study in balance and control—every curb hit, every steering correction, feels deliberate, measured, and addictive.
What Sets the Moza R21 Ultra Direct Drive Wheelbase apart?
-
True Zero-Cogging Flat-Wire Motor — The R21’s motor design eliminates any stepping sensation through the wheel, providing continuous torque delivery that feels fluid through every motion. Unlike many bases that subtly pulse at low speed, this one stays butter-smooth even in tight chicanes. The torque delivery feels organic, giving your hands a genuine sense of weight transfer that stays consistent across the steering range.
-
Force Feedback Refinement through Nexgen 4.0 — While power gets attention, finesse wins races. The Nexgen 4.0 algorithm takes the raw output of the R21’s motor and refines it into something cohesive and tunable. Racers note the way surface detail transitions naturally—no harsh clipping or dead zones. Whether driving vintage Formula cars or modern GTs, it translates mechanical grip changes with a level of smoothness few wheelbases achieve.
-
Thermal Efficiency During Long Sessions — The R21’s intelligent thermal management ensures consistent torque output even in endurance events. Its CNC aluminum body doubles as a heat sink, keeping the motor temperature stable without noisy fans ramping up mid-race. Many drivers have praised how the force feedback remains stable after hours of continuous driving—no fade, no softening, just steady torque.
-
Mechanical Integrity and Build Feel — Constructed from a solid aluminum unibody, the R21 gives an impression of industrial strength the moment you mount it. Every torque surge feels securely grounded, and even under aggressive countersteer inputs, the base stays rock-solid. Add the RGB telemetry lighting, and you have a piece of gear that looks as purposeful as it feels on the track.
Pros and Cons
| Pros |
Cons |
| Zero-cogging motor delivers smooth and consistent torque feel. |
PC-only compatibility; no console support. |
| Efficient cooling maintains stable output during long races. |
Requires solid rig mounting to handle torque forces. |
| Compact aluminum housing offers excellent rigidity and durability. |
|
| Deep customization via MOZA Pit House software. |
|
Specifications
| Specification |
Value |
| Motor Type |
Zero-cogging Flat-wire Direct Drive Motor |
| Maximum Torque |
21Nm |
| Encoder Type |
21-bit Magnetic Encoder |
| Encoder Resolution |
2,097,152 PPR |
| Housing Material |
Aluminum Alloy |
| Rear Cover Material |
Plastic |
| Coupler Material |
Aluminum Alloy |
| Dimensions |
248.8 × 140 × 135 mm |
| RGB Light Strips |
2, 16.7 Million Colors |
| Software |
MOZA Pit House (Nexgen 4.0 Algorithm Support) |
| Ports |
Power, PC, Pedals, Dashboard, Shifter, Handbrake, Emergency Stop Switch |
| Mounting Options |
Bottom, Front, and Side Mounting Supported |
| Quick Release |
Supported |
| Mobile App Support |
Yes |
| Cooling System |
Intelligent Thermal Management |
Moza R21 Ultra Direct Drive Wheelbase Compatibility
| Compatible Hardware |
Details |
| MOZA Steering Wheels |
Fully supported via quick release, seamless data transfer |
| MOZA Pedals, Shifters, and Handbrakes |
Direct connection through dedicated rear ports |
| Third-Party Peripherals |
Limited compatibility; may require USB adapters or separate hubs |
The Moza R21 Ultra Direct Drive Wheelbase connects flawlessly within the MOZA ecosystem, linking directly to pedals, shifters, dashboards, and handbrakes without additional USB cables. Its quick release system provides firm, play-free locking and full signal continuity with all MOZA wheel rims. While it can technically integrate with third-party peripherals via adapters, the R21 performs at its best when used in a MOZA-centered setup where communication speed and signal integrity remain uncompromised.
The R21 is fully compatible with Windows PC platforms and supports leading sim titles such as iRacing, Assetto Corsa Competizione, rFactor 2, Automobilista 2, and F1 24. It does not support PlayStation or Xbox consoles. With MOZA Pit House software, users can fine-tune force feedback profiles, torque curves, and damping for each title, ensuring consistent control feel across every racing environment—from GT endurance to open-wheel competition.
```
