Moza R21 Ultra True Torque Direct Drive Wheel Base

No review yet. Write Review
Regular price
$1,299.00
Regular price
Sale price
$1,299.00
Tax included. Shipping calculated at checkout.

Vendor : Moza

Product Type : Wheel Base

Sku : RS090

Secure Purchase Secure Purchase
Free Shipping Free Shipping
Satisfaction Guarantee Satisfaction Guarantee
Manufacturer Warranty Manufacturer Warranty
MOZA Racing · Authorised Dealer

Sustained 21 N·m, Without Throttling

The Moza R21 Ultra is a flagship direct drive wheel base built around an industrial-grade zero-cogging flat-wire motor that holds 21 N·m without backing off when things get hot. A 21-bit magnetic encoder with 2.09 million points of resolution and a 600 MHz processor keep the fine detail intact, and MOZA's force feedback algorithm gives you the tools to shape it. Housed in a CNC-machined die-cast aluminium unibody, with bottom, front and side mounting for any serious rig.

21 N·m sustained torque 21-bit magnetic encoder 2,097,152 PPR 600 MHz processor Zero-cogging flat-wire motor CNC aluminium unibody Dual RGB strips iRacing 360 Hz mode
Authorised Australian Dealer for MOZA RacingGenuine stock, local QLD warranty support, prices in AUD including GST.
Authorised DealerGenuine MOZA stock
Local WarrantyHandled in QLD, no overseas returns
Free Shipping Australia WideFreight from Queensland
Sim Racing AdviceWe run what we sell
Flagship hardware

Engineered to hold its torque

Plenty of bases can hit a big number for a few seconds. The R21 Ultra is built around a motor and a cooling system designed to keep delivering it, which is what actually matters over a stint.

Moza R21 Ultra direct drive wheel base three-quarter view on a dark studio backdrop
Flagship line-up

Top-tier performance, compact profile

The R21 Ultra sits in MOZA's flagship direct drive range, engineered for sim racers who want serious force through the wheel in a motorsport-inspired body that still fits a normal cockpit.

Close-up of the Moza R21 Ultra flat-wire motor stator windings
Zero cogging

All-new flat-wire motor

MOZA's next-generation custom flat-wire motor is built specifically for sim racing. True zero cogging means smooth rotation with none of the notchy magnetic detents that give a cheaper base away.

Moza R21 Ultra industrial-grade motor rotor, the source of its sustained 21 Nm torque
21 N·m sustained

No throttling back

An industrial-grade motor engineered for durability and thermal efficiency delivers a sustained 21 N·m without throttling, which is what makes it suited to endurance racing rather than a hot lap.

Moza processor chip on a circuit board, the 600 MHz CPU behind the R21 Ultra force feedback
21-bit encoder, 600 MHz CPU

Over two million points of precision

A high-resolution 21-bit magnetic encoder feeding a 600 MHz processor captures every steering input and surface detail, so small corrections and small changes in the road both register instead of being smoothed away.

GT race car cornering on a circuit, the kind of racing the Moza R21 Ultra is built for
Race your favourites

Compatible across the board

iRacing with a 360 Hz high-frequency mode, plus Assetto Corsa, Le Mans Ultimate, the F1 series, WRC, Automobilista 2, rFactor 2, RaceRoom, Project CARS, Forza, BeamNG.drive and dozens more.

Torque against time graph showing the Moza R21 Ultra holding output instead of throttling back
Intelligent thermal management

Runs cooler under load

A fully upgraded cooling system with ample motor headroom, real-time temperature monitoring and smart torque regulation, so performance stays where you set it through the most demanding sessions.

Exploded view of the Moza R21 Ultra output shaft and slip ring assembly
Extreme durability

Slip ring built to last

MOZA's slip ring handles over 10 million rotations and transfers data at 2 M/s, giving a solid connection and lag-free communication between the wheel and the base.

Rear of the Moza R21 Ultra showing dedicated ports for pedals, dashboard, shifter and handbrake
Native ecosystem ports

No USB hub required

Dedicated ports for all the major MOZA peripherals mean pedals, shifters, dashboards and a handbrake plug straight into the base, keeping the rig tidy and your PC's USB ports free.

Moza R21 Ultra shown bottom, front and side mounted to an aluminium sim racing rig
Versatile mounting

Bottom, front or side

All three mounting orientations are supported, so the R21 Ultra suits a tubular cockpit or an aluminium profile rig without a workaround. At this torque, a rigid mount is not optional.

Three Moza R21 Ultra wheel bases showing the dual RGB light strips in different colours
RGB telemetry

Lighting that tells you something

Dual RGB light strips along the top edges give 16.7 million colours and fully customisable effects, including real-time telemetry feedback for ABS, traction control, gear shifts and flag signals.

Hands leaving a sim racing wheel, illustrating the Moza R21 Ultra hands-off protection
Hands-off protection

Stops the oscillation

The base detects when your hands leave the wheel, quickly stops any oscillation and safely centres it. At 21 N·m that is a safety feature, not a convenience.

Software

Shape the force feedback yourself

MOZA's advanced force feedback algorithm pairs the hardware with the tuning tools to use it. Everything below lives in MOZA Pit House on PC, with cloud-based configuration so a setup follows you to a new machine.

Moza Pit House software showing R21 Ultra force feedback equaliser and tuning controls
  • iRacing 360 Hz mode for richer, more responsive force feedback, enabled through Pit House
  • FFB interpolation smooths abrupt torque spikes and dips into a natural, progressive curve
  • Game FFB decoupling splits the signal into individually adjustable components
  • Force feedback equaliser filters out noise and keeps only the cues that matter
  • Custom non-linear FFB curve tuning helps you sense traction loss sooner
  • Real-time temperature monitoring with smart torque regulation
  • Cloud-based app configuration, so your settings move with you
  • Free MOZA Pit House download for Windows
Why the R21 Ultra

What you actually get for the money

  • 21 N·m sustained torque

    An industrial-grade motor that holds its output without throttling, built for endurance sessions rather than a single quick lap.

  • Zero-cogging flat-wire motor

    MOZA's next-generation custom motor with genuinely smooth rotation and no notchy detents through the wheel.

  • 21-bit encoder and 600 MHz CPU

    2,097,152 points of resolution feeding a fast processor, so fine surface detail survives instead of being rounded off.

  • CNC-machined aluminium unibody

    A rigid die-cast aluminium body for the structural integrity and torsional rigidity high torque demands, without unnecessary weight.

  • Intelligent thermal management

    An upgraded cooling system with real-time temperature monitoring and smart torque regulation, so it runs cooler under sustained load.

  • Complete ecosystem ports

    Pedals, dash, shifter, handbrake and an emergency stop switch all plug straight into the base, keeping the rig tidy.

Range comparison

Where the R21 Ultra sits

All three Ultra bases share the same zero-cogging flat-wire motor platform, the 21-bit encoder and the 600 MHz processor. What separates them is torque, physical size and, on the R25, a true torque sensor.

Model Torque Best for
Moza R16 Ultra 16 N·m constant The compact Ultra, 206 mm long. Serious torque in a base that still suits a wheel stand or a mid-size cockpit.
Moza R21 Ultra 21 N·m sustained The flagship all-rounder. More loading through the wheel for GT, formula and endurance racing, on a rigid cockpit.
Moza R25 Ultra 25 N·m sustained Maximum torque, and the only one with a built-in true torque sensor for real-time torque sensing. Esports and professional use.
Technical specs

Specifications

Drive system Direct drive
Maximum torque 21 N·m
Motor Zero-cogging flat-wire
Encoder type 21-bit magnetic encoder
Encoder resolution 2,097,152 PPR
Processor 600 MHz
Housing material Aluminium alloy
Rear cover material Plastic
Coupler material Aluminium alloy
RGB light strips 2 (16.7 million colours)
Quick release Supported
Mobile app support Yes
Ports Power, PC, pedals, dashboard, shifter, handbrake, emergency stop switch
Mounting options Bottom, front and side mounting supported
Dimensions 248.8 x 140 x 135 mm
Platform PC
SKU RS090
Common questions

Frequently asked questions

What is the Moza R21 Ultra?
The R21 Ultra is a flagship direct drive wheel base from MOZA's Ultra series. It delivers a sustained 21 N·m of torque from a zero-cogging flat-wire motor, paired with a 21-bit magnetic encoder, a 600 MHz processor and MOZA's advanced force feedback algorithm.
Is 21 Nm too much for a normal setup?
It is more than most drivers run day to day, and that headroom is the point: you get consistent force without the base working hard. What it does demand is a rigid cockpit. If you are on a wheel stand or a desk, look at the R16 Ultra instead.
What does sustained torque mean?
It is the torque the base holds continuously rather than a brief peak. MOZA rates the R21 Ultra at a sustained 21 N·m without throttling, which means the feel on the last lap of a stint matches the first.
What is zero cogging and why does it matter?
Cogging is the notchy, magnetic detent feeling as a motor rotates. The R21 Ultra uses a custom flat-wire motor engineered for true zero cogging, so the only thing you feel through the wheel is the force feedback itself.
How does it compare to the R25 Ultra?
Same motor platform, encoder and processor, and the same 248.8 mm body. The R25 Ultra adds 4 N·m and, more importantly, a built-in true torque sensor with 0.1 percent sampling accuracy for real-time torque sensing. The R21 does not have that sensor.
How does it compare to the R16 Ultra?
The R16 Ultra is the compact one at 206 mm long against the R21's 248.8 mm, with 16 N·m instead of 21. If space or rig rigidity is a constraint, the R16 is the sensible choice. If you have a solid cockpit and want more loading, the R21 is the step up.
Does it support iRacing?
Yes, including a 360 Hz high-frequency force feedback mode that you enable through MOZA Pit House. It delivers richer, more responsive feedback and noticeably more driving precision.
Which other games does it work with?
Assetto Corsa, Le Mans Ultimate, the F1 series from 2018 through F1 25, WRC 9, 10 and Generations, Richard Burns Rally, Automobilista and Automobilista 2, rFactor 2, RaceRoom, Project CARS 1 to 3, Forza Motorsport and Horizon, KartKraft, Live for Speed, Wreckfest, BeamNG.drive, MudRunner, Euro Truck Simulator 2 and American Truck Simulator, among others.
How do I mount it?
Bottom, front and side mounting are all supported. At 21 N·m you want an aluminium profile or a solid tubular cockpit. A desk clamp is not appropriate for this base.
What ports does it have?
Power, PC, pedals, dashboard, shifter, handbrake and an emergency stop switch. MOZA peripherals connect directly to the base, so you do not need a USB hub or extra cabling.
Does it get hot?
MOZA fitted the R21 Ultra with a fully upgraded intelligent cooling system. Real-time temperature monitoring and smart torque regulation work together to keep performance stable through long sessions.
Can I tune the force feedback?
Extensively. MOZA Pit House gives you FFB interpolation, game FFB decoupling, an equaliser and custom non-linear curve tuning, plus per-game profiles. Cloud-based configuration means a setup follows you to a new PC.
Which wheels fit it?
The R21 Ultra takes the MOZA wheel range through the standard quick release. Browse our MOZA wheels to pick a GT, formula or round rim to suit what you race.
What is the RGB lighting for?
Two RGB strips along the top edges give 16.7 million colours with customisable effects, and they can show real-time telemetry: ABS, traction control, gear shifts and flag signals.
Does it work on console?
No. The R21 Ultra is a PC wheel base. If you need Xbox or PlayStation support, talk to us and we will point you at a base and wheel combination that carries the right licence.
What warranty does it come with in Australia?
As the authorised Australian dealer for MOZA Racing, Player1 Sim Gear handles warranty locally in Queensland with no overseas returns required, backed by Australian Consumer Law.
Do you offer free shipping in Australia?
Yes. MOZA products ship free Australia wide, with freight from our Queensland base. We are not shipping MOZA to New Zealand at the moment.
Is the price in AUD and does it include GST?
Yes, the price shown is in Australian dollars and includes GST, from a local authorised MOZA dealer with no hidden import fees.
Can you help me build the whole rig around it?
Absolutely. Message us and we can match the R21 Ultra to a wheel, pedals, a shifter or handbrake and a cockpit rigid enough to do 21 N·m justice.

Questions about the R21 Ultra?

Torque, mounting, which wheel to pair with it or whether the R16 or R25 is the better call, our team race on this gear and will give you a straight answer.

Call 0488 385 870

Send us a message

Ask us anything about the Moza R21 Ultra, from mounting to matching a wheel and pedals.

Australia-Wide Shipping

We ship all over Australia and want you to get your new gear as fast as possible, so we always aim to ship on the same day we receive your order, using the fastest and most reliable couriers in Australia. Of course, it may not always be possible to process your order on the same day, so please allow 1-2 business days for processing. If we encounter any delays we will let you know via email.

To  maximise efficiency, Player1 Sim Gear ships all products in their original packaging straight from our warehouses or directly from our suppliers and manufacturers. Orders may be shipped in part or in full, and different courier companies may be used for different parts of your order. Please allow 2-8 business days for delivery.  Please advise your phone number at checkout so we can get in touch with you if there is any problem. If you should receive a product that has been damaged while in transit please contact us immediately.

Please make sure someone will be available to receive your order, otherwise, your package may be diverted to your local post office or to your local shipping depot. We recommend all deliveries are sent to a business address to avoid any re-delivery charges.  Note: Player1 Sim Gear will only ship to confirmed addresses, we cannot ship to PO Boxes sorry.

There may be times when the product you have ordered turns out to be out-of-stock with us or our suppliers. We will contact you to arrange a refund or alternate product if an item you have ordered is out-of-stock or unavailable for immediate shipment. You may cancel your order at any time prior to shipping.

International Orders: Apologies at the moment we don't ship internationally as standard. However if you outside Australia and there is something you'd like to purchase please do message us at sales@p1simgear.com.au, we will be happy to see what we can do.

Note re Larger cockpits and remote locations:  We do our very best to ensure accurate shipping rates, however for larger cockpits and heavier items, rarely our shipping pricing may not be correct. In the event that the actual shipping costs for a large item should be exceed those quoted in your order, we will call you to discuss before we dispatch. You will have the option then to amend or cancel your order at no cost.

Returns Policy

We hope we can provide as much information and guidance as possible about each item so that you will love whatever you buy. We do understand though that the unforeseen happens. So in the unlikely event you wish to raise a return, please contact us and we shall discuss options and how we will proceed with the return request.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.  You may return your item(s) for an exchange/refund, so long as it is in the same condition that you received it, unopened, with tags and in its original packaging. You’ll also need the receipt or proof of purchase.

To request a return, you must first send an email to support@p1simgear.com.au with your Order number as the email subject and Reason for Return in the email body/message. We will reply to your email with your relevant return information. We will not accept any returned items if we have not had an email from you requesting a return, so you must request a return first, before sending anything back. 

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

All returns are subject to the following conditions:
  • You, the buyer, are are fully responsible for paying all charges necessary to return the item to us. A restocking fee of up to 20% of the returned product's value may apply.

  • Items must be returned sealed and unused in their original packaging and in a fully resalable condition. All items are supplied to you, the customer, in brand new condition unless explicitly stated otherwise in the product title. For such items supplied in Brand New condition, if any seals have been broken, the item cannot subsequently be sold as new after the return, therefore the return will be declined or a restocking fee will be levied and partial refund given.

  • If the item is deemed DOA or faulty once opened, we shall troubleshoot and assess the nature of the fault and repair the item or replace like-for-like, should the fault be deemed a legitimate fault.

  • Items returned that are not in their original condition may not be accepted, and the refund request declined.

  • Returned items must be complete with all packaging in good condition, ready for immediate resale. All components and items within packaging (e.g. polystyrene/bubble wrap) must be returned also. We reserve the right to levy a charge to replace product packaging which is damaged  / defaced / missing.

  • We cannot accept responsibility for returned parcels which are undelivered back to us (e.g. lost by the courier, delivered to incorrect address) or damaged in transit back to us. We strongly advise you send returned items using an insured & tracked service. Furthermore, we also strongly advise you to obtain and retain your proof of postage, as you may require it should you decide to make a claim against your carrier should they damage or lose your item whilst returning it to us.

For items which require assembly, we are not responsible for any charges (labour or otherwise) incurred during fitment/removal of allegedly faulty (or incorrectly supplied) parts.

Returns made outside of the 30-day return window, or with no valid reason, will be declined.

Pre-Order Cancellations
In the event a Pre-Order becomes unavailable or is cancelled by Player1 Sim Gear you, the buyer, are entitled to a full refund. In the event that you change your mind or choose to cancel your Pre-Order for any reason prior to shipment, cancellation fees may apply to offset any unrecoverable costs incurred by Player1 Sim Gear.
User Manuals, Drivers & Configuration docs available at: https://mozaracing.com/downloads