MOZA R21 Ultra Direct Drive Wheel Base

$639.00 USD $699.00 USD

Shipping calculated at checkout.

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.

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MOZA R21 Ultra Direct Drive Wheel Base

Dispatched within 3 business days.
Delivery estimate at checkout

$639.00 USD

At a Glance

Engineered for Professionals

The MOZA R21 Ultra delivers sustained 21Nm of torque with next-gen force feedback algorithms, bringing uncompromised realism and control to every racing scenario.

21-bit Magnetic Encoder Precision

With over 2 million points of resolution, the high-accuracy 21-bit magnetic encoder captures every input detail. Experience unmatched steering fidelity, from subtle road textures to aggressive cornering forces.

All-new Zero-Cogging Flat-Wire Motor

The R21’s next-generation flat-wire motor minimizes cogging torque, providing ultra-smooth and consistent force feedback. Every movement feels precise, natural, and immersive.

Sustained 21Nm Torque Output

Delivering a constant 21Nm of industrial-grade torque, the R21 ensures uncompromised performance during endurance racing sessions. Enjoy peak realism and control without thermal throttling.

Refined Design with RGB Customization

Crafted from CNC-machined aluminum, the R21 combines strength with elegance. Dual RGB light strips offer 16.7 million customizable colors, enabling telemetry-based effects for ABS, traction control, gear shifts, and flag signals.

iRacing 360Hz Mode

Experience ultra-responsive force feedback with iRacing’s 360Hz update. Enhanced detail and precision deliver deeper immersion and sharper control in every race.

New Force Feedback Algorithm

Seamlessly integrating advanced hardware and software, the R21’s new algorithm delivers more realistic, detailed force feedback with tuning options refined for every driving style.

Flexible Rig Compatibility

Engineered for universal integration, the R21 supports multiple mounting orientations—bottom, front, and side—to fit diverse racing setups.

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SPECS

MOZA R21 Ultra Direct Drive Wheel Base

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

Mounting Holes Diagram

MOZA R21 Ultra DD Base Mounting Holes Diagram >

WHAT'S INBOX

R21 Ultra Direct Drive Wheelbase * 1
Power Adapter
Power Cord
Data Cord
Bolt Kit

FAQs

FAQs - Find out more

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.

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.

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.

In short, it’s a true step up in realism and consistency.

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.

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.

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MOZA R21 Ultra Direct Drive Wheel Base

At a Glance

SPECS

FAQs

Customer Reviews