Sim-Lab DDS39 TorqueSync Founders Edition

Sim-Lab DDS39 TorqueSync Founders Edition

The Sim-Lab DDS39 TorqueSync is the flagship of the TorqueSync range: a 39 Nm Direct Drive wheelbase pairing an industrial SPMSM servo motor with a 350 VDC architecture at 40 A, a 2,500 W integrated power stage and patented TorqueSync processing running at over 100 kHz. Developed with SOLO Motorcontrollers for maximum headroom under the heaviest loads, manufactured in Italy in an ISO-certified facility, TÜV SÜD approved and backed by a 4-year international warranty.

Main Features

• 39 Nm of true holding torque: tested over thousands of simulated driving hours at sustained maximum torque, the DDS39 maintains full output indefinitely without thermal derating. Force feedback is identical from lap one to lap three hundred — decisive in endurance.
• 350 VDC at 40 A: an SPMSM industrial AC brushless motor, hand-built with harmonised magnet pairs and distributed-wound stator cores, fed by a high-voltage bus with the reserve to overcome back-EMF, keep torque available at speed and deliver class-leading slew rates.
• Patented TorqueSync technology: a signal translation layer running at over 100,000 updates per second, aligning every force command from the simulator with motor torque at minimal latency, so tire slip, road texture and load transitions come through cleanly.
• 24-bit encoder with 16 million steps for micro-detail resolution and ultra-accurate motion control.
• Integrated 2,500 W peak-rated power supply: no external brick, one mains cable, shorter power paths and cleaner thermal management.
• Future-proof data passthrough: full USB 2.0 runs directly through the base to your PC, with a dedicated 5V line at 2,500 mA for high-draw displays and button boxes, through an industrial replaceable slipring rated for 200 million cycles.
• Open ecosystem: Ø70 mm M5 bolt pattern, compatible with any wheel supporting standard USB, with no proprietary lock-in, licences or special adapters.
• Designed to adapt: precision mounting rails on all four sides plus dedicated front-mount points, for wheeldeck, side-mount or front-mount installation. Slots on top also take a DDU or light monitor mount.
• RaceDirector software: torque curves, damping and slew rate with precision controls, plus a Telemetry FFB mode showing the incoming simulator signal alongside actual motor output. Upload and download community setups.
• Safe Torque Off (STO) included, with active fan cooling.
• Founders Edition: dedicated engraving with a unique serial number, the new Xero-Play Quick Release V2 and a premium collector's booklet.

Technical Specifications

• Peak torque: 39 Nm
• Encoder: 24-bit (16 million steps)
• Servo motor: SPMSM, AC brushless, industrial type
• Control loop: DSP chip, 100+ kHz multithreaded
• Internal power supply: integrated, 2,500 W peak-rated
• Internal servo power storage: 350 VDC at 40 A
• Power input: 110 / 240 VAC
• I/O: USB 3.0 + 12 V
• STO: included
• Data passthrough: USB 2.0 with 2,500 mA on the USB power line
• Power delivery passthrough: 5 V / 2,500 mA (standard USB is 500 mA)
• Slipring: industrial type, replaceable, easy front access, rated 200 million cycles
• Wheel mounting interface: Ø70 mm, M5 bolt pattern
• Mounting: wheeldeck, front-mount and side-mount compatible
• Cooling: active fan cooling
• Dimensions (without QR): 420 x 130 x 130 mm (L x W x H)
• Mass: 13.5 kg
• Software: RaceDirector
• Manufacturing: Italy, ISO-certified facility, TÜV SÜD approval mark
• Warranty: 4 years, international

What's in the Box

• DDS39 TorqueSync wheelbase (Founders Edition, engraved with unique serial number)
• Xero-Play Quick Release V2
• Hardware kit for mounting
• Premium collector's booklet

Compatibility

PC. The DDS39 supports iRacing and all popular racing titles on PC, and is configured through RaceDirector. It accepts Sim-Lab and GRID Engineering wheels as well as any third-party wheel using the Ø70 mm M5 bolt pattern, with data passthrough for wheels equipped with USB-C, USB-A or an internal connector. Mounting covers wheeldeck, side-mount and front-mount, including direct fitment on the Sim-Lab P1X Ultimate and P1X Pro front-mount versions. At this torque level, a rigid cockpit is strongly recommended.

Which model to choose

The DDS39 is for drivers who want the ceiling: 39 Nm sustained without derating, a 350 VDC bus at 40 A and a 2,500 W stage that keeps full torque on tap through the heaviest, fastest inputs, in a 420 mm housing at 13.5 kg. If your driving sits below that envelope, the DDS26 delivers the identical architecture, encoder, processing, connectivity and software at 26 Nm, in a shorter, lighter package.

FAQ

Who is the DDS39 for?

For drivers who want no ceiling on force feedback: heavy GT and open-wheel loads, rally and drift transitions, and long endurance stints where output must stay constant. Its 2,500 W stage and 350 VDC bus at 40 A keep the full 39 Nm available through the fastest direction changes, with zero thermal fade.

What is the difference with the DDS26?

Torque and power delivery only: 39 Nm with a 2,500 W stage at 40 A against 26 Nm with a 1,500 W stage at 25 A, in a slightly longer housing (420 mm vs 380 mm) at 13.5 kg vs 11.1 kg. Encoder, motor technology, TorqueSync processing, connectivity, mounting, software and warranty are identical.

Why a 350 V architecture rather than 48 V?

Voltage defines speed capability and response, current defines torque. As the motor turns faster it generates back-EMF, and a controller can only push current if its bus voltage sits above it. A 48 V system runs out of headroom sooner, so torque falls off at speed and transitions slow down. The 350 VDC bus keeps torque available across a wider speed range and delivers a higher slew rate — precisely what matters when catching slides or hitting kerbs.

Is 39 Nm manageable?

Yes, with sensible settings. Every force feedback parameter is adjustable in RaceDirector, so you can start lower and build up, with instant profile switching per car and per sim. Safe Torque Off is included, and a rigid cockpit mounting is strongly recommended at this torque level.

Does it support iRacing 360 Hz?

The DDS39 ships fully compatible with iRacing using the standard force feedback path. The optional 360 Hz mode is not in the day-one build: the control stack already handles high-rate torque processing, so it will be enabled through a firmware and software update once the integration is finalised. No hardware change needed.

Does it work with my existing wheels?

Yes, provided they use the Ø70 mm M5 bolt pattern. The ecosystem is fully open: any wheel supporting standard USB connects without adapters or licences, and the quick release slipring carries full data and power, so displays, LEDs and telemetry modules keep working normally.