Moza Racing R21 Ultra Wheelbase

MOZA R21 Ultra Direct Drive Wheel Base

The MOZA R21 Ultra Direct Drive Wheel Base is a professional-grade 21Nm direct drive wheel base designed for sim racers who demand precision, consistency, and detailed force feedback. Built for both competitive and endurance racing, the R21 Ultra converts in-game telemetry into clean, realistic steering forces with exceptional stability and control.

High-Torque Direct Drive Performance

21Nm Sustained Torque Output

Powered by an industrial-grade direct drive motor, the R21 Ultra delivers a constant 21Nm of sustained torque via a high-efficiency 360W power system. This ensures strong, realistic force feedback without thermal throttling, even during long racing sessions.

Zero Cogging Flat Wire Motor Technology

The advanced flat wire motor design significantly reduces cogging torque, resulting in smoother force transitions and a more natural steering feel. This allows precise micro-corrections without unwanted resistance or feedback spikes.

Precision & Force Feedback Accuracy

21-Bit Magnetic Encoder

A high-resolution 21-bit magnetic encoder provides 2,097,152 input points per revolution, enabling extremely accurate wheel position tracking. This level of precision delivers refined steering response and confident control through complex track conditions.

Advanced Force Feedback Algorithm

MOZA’s refined force feedback algorithm dynamically adjusts output based on road surface detail, grip levels, and traction changes. Kerbs, surface texture, tyre slip, and cornering forces are communicated with clarity and consistency.

iRacing 360Hz Mode

When used with iRacing, the R21 Ultra supports a 360Hz force feedback update rate, improving signal speed and detail for sharper response and better control in fast-paced racing environments.

Design, Mounting & Build Quality

CNC Machined Aluminium Housing

The wheel base is constructed from CNC-machined aluminium alloy, offering excellent rigidity and vibration resistance. This robust housing ensures durability and stable performance under heavy force feedback loads.

Flexible Mounting Options

Supporting bottom, front, and side mounting, the R21 Ultra is compatible with a wide range of sim racing rigs and cockpit designs, making integration simple and secure.

Connectivity & Customisation

RGB Telemetry Lighting

Dual RGB LED light strips with 16.7 million colour options can be configured to display telemetry data such as gear shifts, ABS activity, and traction control status, adding functional visual feedback to your setup.

Quick Release & Accessory Ports

The R21 Ultra features a fast-action quick release system and multiple ports for pedals, shifters, handbrakes, and dashboard accessories, helping reduce cable clutter while supporting expandability.

Mobile App Integration

Compatible with the MOZA mobile app, the R21 Ultra allows wireless tuning and system adjustments, enabling on-the-fly changes without leaving your racing session.

Built for Competitive & Endurance Racing

With consistent torque delivery, ultra-high input resolution, and smooth force feedback free from cogging, the R21 Ultra is designed for drivers who require reliability over long stints. Its strong aluminium chassis, advanced motor technology, and wide compatibility make it a powerful foundation for any serious sim racing rig.

The MOZA R21 Ultra Direct Drive Wheel Base delivers professional-level performance, precision control, and long-term stability—race after race.