MOZA R25 Ultra 25Nm True Torque Direct Drive Wheelbase

MOZA R25 Ultra True Torque Direct Drive Wheelbase — 25Nm sustained torque, plus a built-in real-time torque sensor. This is MOZA's most advanced Ultra-series sim racing wheelbase, designed for drivers who demand both substantial force-feedback reserve and accurate control of the torque actually being delivered at the steering shaft.

The R25 Ultra combines a high-density, zero-cogging flat-wire direct drive motor, 21-bit magnetic encoder, 600MHz processor and MOZA's NexGen Force U1 algorithm. What makes it distinct from the R16 and R21 Ultra is its True Torque sensor, which MOZA specifies at 0.1% sampling accuracy with 2kHz sampling. The system directly measures output torque to support more accurate force-feedback control.

With a supported version of MOZA Pit House and updated firmware, the Ultra-series software unlock can raise the R25 Ultra's maximum available torque to 27Nm without replacing hardware. The standard manufacturer rating remains 25Nm sustained torque; these are different figures and should not be confused.

UPSHIFT cockpit recommendation: pair the R25 Ultra with our R-MAX 160×40 aluminium-profile rig and suitable high-strength mounting. The base is designed for Windows PC; Xbox requires an officially licensed MOZA ESX wheel and a supported game. PlayStation is not officially supported. Steering wheel, pedals and cockpit are sold separately.

25Nm Sustained Torque, True Torque Sensing and Extra Headroom

MOZA rates the R25 Ultra at 25Nm sustained output, giving it four additional newton-metres over the R21 Ultra. The latest Ultra-series software unlock also allows a 27Nm maximum after installing the required Pit House and wheelbase firmware and activating the free torque boost. This does not mean that 27Nm is intended to be your continuous steering resistance.

When driving at a more realistic and manageable force-feedback setting, a high-torque wheelbase offers considerable headroom for brief peaks — changes in tyre load, kerb strikes, steering corrections and high-downforce corners. That is the principal advantage of owning a 25Nm base without regularly running it at 100% output. Clipping can still occur through inappropriate in-game force-feedback gain, so the hardware's reserve must be matched with proper software configuration.

The other major difference is built-in True Torque sensing. Rather than relying exclusively on a model of motor current to determine output, the sensor measures the physical torque delivered by the base. MOZA quotes 0.1% sampling accuracy and 2kHz response, allowing the controller to monitor actual output as it changes. These are MOZA's manufacturer specifications; they are not a claim that the R25 will automatically produce faster lap times.

For context, our Force Feedback: The More the Merrier? guide explains why a strong wheelbase can be valuable even when you seldom use its maximum output.

Why Choose the MOZA R25 Ultra?

The R25 Ultra has several meaningful engineering differences, rather than simply a larger torque number:

• 25Nm sustained direct drive torque: abundant force-feedback headroom for demanding GT, Formula and endurance racing.
• Integrated True Torque sensor: direct real-time measurement of physical torque at 0.1% quoted accuracy and 2kHz sampling.
• Free Ultra-series torque unlock: up to 27Nm maximum with supported Pit House software and firmware.
• Zero-cogging flat-wire motor: designed for very smooth rotation and strong torque density.
• 21-bit magnetic encoder and 600MHz processing: precise position measurement and responsive motor control.
• NexGen Force U1, iRacing 360Hz and RGB telemetry: an adjustable premium force-feedback platform.
• Flexible mounting: front, bottom and side mounting options with suitable hardware.

High-Density Flat-Wire Motor and True Torque Sensor

At the centre of the R25 Ultra is a direct-drive-optimised flat-wire motor. MOZA describes the design as having zero cogging — reducing the magnetic stepping sensation that can otherwise mask fine steering effects near the centre. MOZA also states that the motor achieves 26% greater torque density than similarly sized competitors, a manufacturer claim rather than an independently established UPSHIFT benchmark.

Its 21-bit magnetic encoder provides 2,097,152 distinct measurement positions per revolution. A 600MHz control processor works with the motor and sensor measurements to interpret feedback requests and regulate the output. Resolution and processor speed alone are not guarantees of feel; the complete hardware and control loop are what matter.

The standout development is the True Torque sensor. By sampling actual wheelbase torque at up to 2,000 times per second, it provides direct measurement feedback to the control system. The intended benefit is more accurate, repeatable delivery of the steering forces requested by the simulation, including changes during fast corrections and demanding corners. This measurement system differentiates the R25 Ultra from the otherwise closely related R21 Ultra.

MOZA combines this hardware with intelligent temperature monitoring and thermal management to help maintain consistent operation during longer sessions. That is useful for endurance racers who value repeatability rather than maximum steering resistance for its own sake.

Native iRacing 360Hz FFB and Wheel LFE

With compatible software and firmware, the R25 Ultra supports iRacing's 360Hz force-feedback mode, receiving more frequent steering-force updates than the simulator's lower-frequency alternatives. It also supports iRacing Wheel LFE for compatible low-frequency effects, allowing drivers to add or remove extra tactile sensations according to their preferences.

These functions are specific to supported simulators and settings. More frequent updates can make changes in force more responsive, but they do not mean that every racing game transmits the same data or effects. Where the steering feels excessively noisy, vibration or unnecessary filtering should be tuned through MOZA Pit House.

NexGen Force Feedback Algorithm U1

MOZA NexGen Force U1 is the control software responsible for shaping motor response and the feedback delivered to the steering wheel. It works with the flat-wire motor, high-resolution encoder and R25 Ultra's direct torque sensor to support precise, configurable steering behaviour.

Through MOZA Pit House, drivers can adjust overall strength, damping, friction and other force-feedback characteristics. You might want comparatively light steering for one vehicle and a heavier, more damped response for another. The aim is to preserve meaningful changes in tyre grip and steering load without creating unnecessarily exhausting steering forces.

The supported Ultra-series torque boost requires MOZA Pit House 1.4.2.0 or later, wheelbase firmware 1.2.12 or later, and completion of MOZA's in-software unlock process. This enables up to 27Nm maximum torque; it does not turn the standard 25Nm sustained rating into 27Nm sustained.

Customisable RGB with Telemetry Lighting

The aluminium-alloy housing incorporates two programmable RGB strips with up to 16.7 million colour choices. Set them to match your simulator or leave the lighting subdued for a professional cockpit appearance.

MOZA also supports telemetry-dependent lighting effects, including applicable ABS, traction-control, gear-shift and race-flag indications. Exact functionality depends on the game, software version and chosen profile. The lighting adds information and visual character; it is separate from the wheelbase's force-feedback performance.

MOZA Pit House, Thermal Management and Safety

MOZA Pit House is the main configuration platform for Windows PC. It provides firmware updates, force-feedback adjustments, compatible device management and supported app or cloud-linked configuration functions. Consistent settings matter especially on a powerful wheelbase: an excessive game signal can clip long before the R25's full mechanical capability is useful.

The motor's temperature monitoring and thermal management are designed to help sustain performance during lengthy sessions. The R25 Ultra also supports MOZA's safety-related wheelbase functions and an optional emergency-stop switch. We recommend keeping force levels under control, securing the base properly and avoiding sudden full-power operation when hands or other objects could be caught by the wheel.

Compatible with the UPSHIFT R-MAX

At 25Nm sustained torque, cockpit rigidity becomes particularly important. UPSHIFT recommends the R-MAX Black Edition, using heavy-duty 160×40 base profiles and 120×40 uprights, for the R25 Ultra and other 20Nm+ wheelbases. This gives the steering system a rigid foundation, with additional capacity for demanding pedals and future simulator upgrades.

MOZA specifies dimensions of 248.8 × 140 × 135mm, weight approximately 9.1kg, and front, bottom and side mounting options. Check the exact wheel mounting plate, fixing-hole positions and any bracket requirements before buying. We would not choose the lighter R-PRO as our standard recommendation for a wheelbase at this level of torque, even though it is an excellent option for lower-powered setups.

MOZA's Expanding Ecosystem

The R25 Ultra supports compatible MOZA quick-release steering wheels, from the FSR2 Formula Wheel and KS Pro to the versatile CS Pro. It can also be the foundation of a full MOZA system with supported pedals, shifters, handbrakes and dashboards.

Which Ultra wheelbase should you buy? The R16 Ultra is already exceptionally capable for many drivers. The R21 Ultra adds substantial sustained-torque headroom. The R25 Ultra justifies its higher price most clearly through the addition of direct torque sensing and its higher sustained output, rather than because everyone needs 25–27Nm at the wheel. All three share the broader MOZA ecosystem and their own supporting specifications.

Racing Game and Platform Compatibility

The R25 Ultra supports a broad selection of Windows PC racing games and simulators. MOZA's compatibility resources include iRacing, Le Mans Ultimate, Assetto Corsa, Assetto Corsa Competizione, Assetto Corsa EVO, rFactor 2, Automobilista 2, RaceRoom, EA SPORTS WRC, DiRT Rally 2.0, Forza Motorsport and supported F1 titles. Game-specific force-feedback features, telemetry, control mapping and update modes vary and may need configuration in Pit House.

MOZA notes that some older titles may recognise the R25 Ultra under an R16/R21 wheelbase preset because the models share a product identifier. This is expected behaviour in those titles and does not itself indicate a compatibility fault.

Platform Support

• Windows PC: officially supported, using MOZA Pit House for configuration.
• Xbox: requires a compatible, officially licensed MOZA ESX steering wheel and supported Xbox racing title. The R25 Ultra wheelbase alone is not an Xbox-licensed controller; check the exact game and accessory combination.
• PlayStation: no official PS4 or PS5 support.

The R25 Ultra includes connection ports for supported MOZA pedals, dashboards, shifters, handbrakes and an optional emergency-stop device. Steering wheel, pedals and simulator cockpit are not included with this standalone wheelbase.