MOZA R21 Ultra Direct Drive Wheel Base

The MOZA R21 Ultra is a 21 Nm direct-drive sim racing wheel base for PC. It uses MOZA's flat-wire motor, a 21-bit magnetic encoder and a CNC-machined aluminum body with two RGB light strips. This is the wheelbase only: add a MOZA steering wheel and pedals. Canada Toyz sells it in CAD and ships from Markham, Ontario.

Key Features

• 21 Nm sustained torque, held through long sessions without throttling, and 360 W rated power.
• Flat-wire motor with ultra-low cogging for smooth, detailed force feedback.
• 21-bit magnetic encoder: 2,097,152 positions per rotation.
• Native iRacing 360 Hz force feedback.
• Two RGB light strips (16.7 million colours) with ABS, traction control, shift and flag telemetry.
• Thermal management with real-time temperature monitoring, plus hands-off protection that centres the wheel when you let go.
• Front, side and bottom mounting; an adjustable bracket is available separately.

What's in the Box

• MOZA R21 Ultra Direct Drive Wheelbase × 1
• Power adapter
• Power cord
• Data cord
• Bolt kit
• User manual and warranty card

Not included: a steering wheel and pedals. Popular pairings include the MOZA Vision GS, Porsche Mission R and Lamborghini Essenza SCV12 wheels, and CRP2 load-cell pedals.

Choosing Your MOZA Wheelbase

Who It's For

• Best for: advanced and semi-professional PC sim racers who want high sustained torque for GT, formula and endurance racing.
• Not for: Xbox or PlayStation. MOZA lists the R21 Ultra for PC only.
• Mounting: needs a cockpit or wheel stand rated for 21 Nm. Check your rig against MOZA's mounting-hole diagram.

Technical Specifications

• Drive system: Direct drive, flat-wire motor
• Maximum torque: 21 Nm (sustained)
• Rated power: 360 W
• Encoder: 21-bit magnetic, 2,097,152 PPR
• USB refresh rate: 1000 Hz
• Input voltage: 110–220 V AC to 36 V DC
• Housing: Aluminum alloy; plastic rear cover; aluminum coupler
• Lighting: 2 RGB strips
• Ports: Power, PC, Pedals, Dashboard, Shifter, Handbrake, E-stop
• Mounting: Front, side and bottom; adjustable bracket optional
• E-stop switch: Optional
• Dimensions: 248.8 × 140 × 135 mm
• Weight: 9.0 kg
• Quick release: Supported
• Software: MOZA Pit House and MOZA mobile app
• Platform: PC

Compatibility

• Racing games include: iRacing, Le Mans Ultimate, Assetto Corsa, Assetto Corsa Competizione, Assetto Corsa EVO, Automobilista 2, rFactor 2, the F1 series, Forza Motorsport and EA SPORTS WRC.
• Wheels: all MOZA steering wheels with the MOZA quick release.

MOZA R21 Ultra FAQ

Is the R21 Ultra's 21 Nm sustained or peak torque?

Sustained. MOZA rates the R21 Ultra at 21 Nm, held through long endurance sessions without throttling.

What is the difference between the R21 Ultra and the R25 Ultra?

Both share the same flat-wire motor, 21-bit encoder and force feedback software. The R25 Ultra has 25 Nm and adds a built-in torque sensor.

How does it compare with the R16 Ultra?

The R21 Ultra has 5 Nm more sustained torque (21 against 16 Nm) in a larger, 9 kg body. See the R16 Ultra if you want a more compact base.

Does it come with a steering wheel or pedals?

No. It is the wheelbase only. Any MOZA steering wheel fits.

Does the R21 Ultra work on Xbox or PlayStation?

No. MOZA lists it for PC only.

What does "Back order" mean on this page?

Back order means the wheelbase is not in our Markham warehouse at the moment. You can still place the order. It is queued and ships when the next supplier shipment reaches Markham, typically in 2 to 4 weeks. Lead time depends on supplier stock and transit.

Where does Canada Toyz ship from?

From Markham, Ontario, to addresses across Canada. Prices are in CAD, and there is no customs paperwork, duty or brokerage fee at delivery. Orders over $300 CAD ship free. See our shipping policy for details.

Is it covered by warranty in Canada?

Yes. It is covered by MOZA's manufacturer warranty, with local support from Canada Toyz in Markham. Contact us at info@canadatoyz.com or +1 289-818-8441.

Browse more MOZA wheelbases, wheels and pedals in our sim racing collection.