Moza R21 Ultra High-Torque Direct Drive Wheelbase

Description

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.

SPECS

MOZA R21 Ultra Direct Drive Wheel Base — Specs +

• Platform: PC
• Drive System: Direct Drive
• Encoder Type: 21-bit Magnetic Encoder
• Encoder Resolution: 2,097,152 PPR
• Maximum Torque: 21 N·m (sustained)
• 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 (PDF)

User Manual +

MOZA R21 Ultra DD Base User Manual (PDF)

What’s in the Box +

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

FAQs

Is the R21 Ultra’s 21Nm torque sustained or peak output? What does that mean for me? +

The 21Nm rating is sustained, not a short-term peak. The base maintains full performance during long endurance sessions without throttling, delivering consistent, realistic feedback every lap.

How does 21Nm compare to other wheel bases on the market? Who is it for? +

21Nm sits above most entry/mid-tier units (≈3–17Nm) while remaining more accessible than extreme flagships. It’s ideal for advanced sim racers or semi-pro drivers seeking sustained torque, precision, and smooth control.

What’s the difference between the R21 and previous MOZA bases (R5/R9), and why upgrade? +

• Higher sustained torque (21Nm) for endurance performance
• Zero-cogging flat-wire motor + 21-bit encoder for ultra-smooth precision
• Intelligent cooling for stable thermal efficiency
• Advanced FFB algorithms & app tuning for a personalized feel

How is thermal performance and long-term durability? Are there safety features? +

Intelligent thermal management monitors temperature and regulates torque to maintain optimal performance. Hands-off Protection can auto-center/stabilize the wheel if your hands leave it, enhancing safety.

Do the RGB lighting and app features affect performance? Can I turn them off? +

RGB lighting is aesthetic/telemetry-driven and can be customized or disabled. The MOZA App handles config/updates; core force feedback processing is local, so there’s no performance loss.

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