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Silver rectangular direct-drive wheel base with front quick-release and RGB lighting ring

Moza

Moza RS090 R21 Ultra 21 Nm driving simulator

SKU CH-PTM5-1BB3K MPN RS090

Direct-drive wheel base delivering 21 Nm sustained torque from a flat-wire motor with a 21-bit encoder and 360 Hz iRacing mode

  • 21 Nm sustained torque for professional-grade sim racing
  • 21-bit magnetic encoder captures over 2 million steering points
  • 360 Hz iRacing mode delivers ultra-responsive force feedback
  • Smart thermal management maintains peak power through endurance races
  • Multi-mount design fits front, side and bottom rig setups

Sustained 21 Nm torque for endurance sim racing

The Moza RS090 R21 Ultra is a direct-drive wheel base built for sim racers who need consistent high torque through long sessions. Its industrial-grade flat-wire servo motor delivers 21 Nm without throttling. A 600 MHz processor and 21-bit magnetic encoder provide over two million points per revolution for precise force feedback. The unit suits rigs requiring front, side or bottom mounting.

Thermal management keeps output steady over hours

Smart thermal regulation prevents performance drop during extended races, unlike designs that fade as heat builds. The advanced force-feedback engine applies smoothing, interpolation and adaptive equalisation for natural, detailed feel. A dedicated 360 Hz iRacing mode matches the simulator's highest update rate for immediate response. Cloud-based app configuration allows tuning without local software installs.

CNC aluminium housing aids heat dissipation

The machined enclosure acts as a heatsink, helping the motor sustain peak torque quietly. Hands-off protection stops the wheel safely when released, while the slip ring is rated for over ten million rotations. RGB lighting adds visual customisation without affecting thermals. Quick-release support lets drivers swap rims rapidly between sessions.

How it compares

Measured against everything we stock in Racing Wheels & Driving Controls, at today’s prices. Recalculated every night.

Price $562.99
Pricier than about 92% of the 79 comparable items (median $185.99).

Specifications

Size & build
Shipping weight11.20 kg
Package size368 × 267 × 203 mm

Questions about this item

How loud or hot does the 21 Nm motor get during long endurance races?

The smart thermal management system uses intelligent cooling to maintain peak performance without throttling through the longest races, keeping noise and heat controlled even at sustained 21 Nm output.

Which mounting hardware do I need on my rig to install the wheel base?

The unit offers front, side and bottom mounting options, so you can bolt it directly to most aluminium-profile rigs using standard M8 or M6 hardware you already have on the chassis.

Will the quick-release and slip ring work with my existing Moza steering wheel?

Yes — the integrated quick-release support and over-10 million-rotation slip ring are designed for Moza wheels, letting you keep your current rim and button modules without adapters.

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