MOZA R21 Ultra
21 Nm sustained direct drive base with zero-cogging flat-wire motor
Description
The MOZA R21 Ultra is a direct drive wheel base rated at 21 N·m of sustained torque (not a short peak figure). Unveiled at Gamescom in August 2025, it replaces the R21 V2 and sits between the R16 Ultra and the flagship R25 Ultra.
Motor and electronics. A next-generation zero-cogging flat-wire motor, a 21-bit magnetic encoder (2,097,152 PPR), on-device force feedback processing, a 1000 Hz USB refresh rate and iRacing 360 Hz mode support.
Design and mounting. CNC-machined aluminum alloy housing and coupler with a plastic rear cover, 248.8 × 140 × 135 mm and 9.0 kg, far smaller than the original R21 and close to the R12 in size. Front, side and bottom mounting are supported (adjustable bracket optional). Power comes from a 360 W adapter (110–220 V AC to 36 V DC).
Lighting, ecosystem and safety. Two RGB strips (16.7 million colors) can show ABS, traction control, gear shift and flag telemetry. Dedicated ports connect MOZA pedals, shifters, handbrakes, dashboards and an optional emergency stop. Hands-Off Protection centers and stabilizes the wheel when you let go, and intelligent thermal management regulates torque based on real-time temperature.
Compatibility. MOZA lists Windows PC as the platform. Xbox play is possible with the MOZA ESX steering wheel; PlayStation is not supported. A steering wheel is not included.
Features & highlights
Driving style
The R21 Ultra targets serious sim racers who want high sustained torque without paying flagship prices. Its 21 N·m flat-wire motor delivers strong, granular road detail in iRacing, Assetto Corsa Competizione, Le Mans Ultimate, Assetto Corsa and rFactor 2, and the extra headroom suits heavy GT3, GTP and endurance cars as well as large-diameter rims for drifting and trucks. Reviewers found it oscillates on banked sections until damping is raised, but once tuned it reads slides early and clearly. Best for competitive and endurance racers on a solid wheel deck or aluminum-profile rig who want to buy once; less suited for desk setups or newcomers to direct drive, who will be better served by the R12 V2 or R16 Ultra.
Build quality
The R21 Ultra uses a CNC-machined aluminum alloy housing and coupler with a plastic rear cover, packed into a 248.8 × 140 × 135 mm, 9.0 kg body that is far more compact than the original R21. The zero-cogging flat-wire motor and 21-bit magnetic encoder are passively cooled with real-time thermal monitoring and no fan, and reviewers reported no overheating. A 360 W external adapter powers it, and MOZA offers up to 24 months of warranty.
Software
The R21 Ultra is set up in MOZA Pit House on Windows PC: force feedback strength, damping, friction and inertia, the effect equalizer and base FFB curve, one-click game presets, firmware updates and RGB strip telemetry. The MOZA mobile app can change settings mid-session. iRacing 360 Hz mode is supported. On Xbox it works when paired with the MOZA ESX steering wheel; PlayStation is not supported. SimHub and Crew Chief run alongside on PC.
Specifications
Pros
- 21 Nm sustained torque at a mid-range price
- Zero-cogging flat-wire motor with clear, detailed feedback
- Compact CNC aluminum body for its torque class
- Silent passive cooling, no overheating reported in reviews
- Built-in ports for the MOZA ecosystem, no USB hub needed
- Effect equalizer helps filter road noise
Cons
- No PlayStation support
- Xbox only with the MOZA ESX wheel
- Can oscillate without added damping (per reviews)
- Slightly rougher feel than the Simagic Alpha EVO Pro in one comparison
- Heavy at 9.0 kg and needs a rigid cockpit
- No wheel or wheel-side quick release included
What's in the box
- R21 Ultra Direct Drive Wheelbase
- Power adapter
- Power cord
- Data cord
- Bolt kit
- User manual
- Warranty card