# Racing wheel base Moza Racing R21 Ultra — direct drive, aluminium, black, 140×248.8×135 mm

**URL:** https://aio.lv/en/product--moza-racing-rs090--11677977
**Data updated:** 2026-03-26 06:19 (EET)
**Category:** Game Controllers
**Manufacturer:** moza racing
**Manufacturer code:** RS090
**EAN:** 6973137271350
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Moza Racing R21 Ultra is a direct-drive racing wheel base constructed from aluminium in black finish. Dimensions are 140 × 248.8 × 135 mm. Designed for high-torque, low-latency force feedback for sim racing setups, it serves as the central motorized base for attaching steering wheels and supports realistic input for racing simulators and training rigs.

## Long description

Moza Racing R21 Ultra is a direct-drive racing wheel base constructed from CNC-machined aluminium in a black finish, with compact dimensions of 140 × 248.8 × 135 mm. Engineered for sim racing and training rigs, the R21 Ultra pairs a zero-cogging flat-wire motor and a 21-bit magnetic encoder to deliver high-resolution steering input and sustained force feedback. The base supports multiple mounting positions and offers integrated ports for MOZA peripherals, making it a central component for realistic, low-latency wheel control in desktop and cockpit setups.
Advantages
The R21 Ultra provides sustained 21 Nm torque output through an industrial-grade motor designed for thermal efficiency and long sessions without throttling. A high-resolution 21-bit magnetic encoder captures precise steering movements with over two million distinct positions, while MOZA’s advanced force feedback algorithm and intelligent thermal management maintain consistent performance. The aluminium unibody housing and robust slip ring construction provide structural rigidity and long-term durability, and dual RGB light strips enable configurable visual telemetry feedback.
Suitable for
Enthusiast and professional sim racers seeking direct-drive force feedback
Home or commercial racing cockpits that require compact, high-torque wheel bases
Training rigs and driver development setups needing accurate steering input and telemetry
Key specifications
Drive type: direct drive with flat-wire motor
Sustained torque: 21 Nm
Encoder resolution: 21-bit magnetic encoder (high resolution, \>2 million points)
Construction: CNC-machined aluminium unibody housing
Cooling and thermal control: intelligent thermal management with real-time temperature monitoring
Mounting options: bottom, front, and side mounting supported
Connectivity: dedicated ports for compatible peripherals and integrated slip ring for continuous rotation data transfer
Dimensions (approx.): 140 × 248.8 × 135 mm
Lighting: dual RGB light strips with full-color customization and telemetry effects
How to use
Mount the R21 Ultra to your chosen rig using the supported bottom, front, or side mounting positions and attach a compatible steering wheel to the motor spline. Connect pedals, shifters, and other MOZA peripherals to the dedicated ports to minimize external hubs. Power the unit, install any required MOZA drivers or the cloud-based configuration app, and calibrate wheel centring and force feedback parameters. Adjust thermal and torque settings as needed through the software to match session length and driving style.
Usage recommendations
For optimal performance, ensure adequate ventilation around the wheel base and avoid prolonged maximum-torque operation without monitoring temperature. Use the MOZA configuration tools to fine-tune force feedback profiles for each simulator title and enable hands-off protection when training or during unsupervised sessions to prevent unexpected wheel oscillation.

## Specifications

| Feature | Value |
|---|---|
| Material | Aluminium |
| Product type | Racing wheel base |
| Quick release system | Yes |
| Peak torque | 21 N⋅m |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 11 kg |
| Height | 135 mm |
| Width | 140 mm |
| Depth | 248.8 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 387 mm |
| Package height | 222 mm |
| Package width | 284 mm |

### Input device

| Feature | Value |
|---|---|
| Drive type | Direct drive |

### Ergonomics

| Feature | Value |
|---|---|
| Product colour | Black |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All moza racing products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized moza racing service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11677977/67017763_large.webp