Qubic System QS-BT1 Belt Tensioner is what happens when brute force meets subtle simulation nuance. This dual-channel, direct drive seatbelt system delivers a muscular 200 N per channel of tactile feedback, translating every brake slam, oversteer correction, and gear shift into physical sensations you can feel in your core. With its direct drive mechanism shared with the QS-220, it’s compact, whisper-quiet, and built for those chasing high-G simulation without turning their rig into a carnival ride. Whether you’re strapping in for a 24-hour endurance run or flying inverted in a flight sim, this unit holds its own—and holds you in place.
What Sets the Qubic System QS-BT1 Belt Tensioner apart?
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Direct Drive Belt Force While other systems rely on gear or pulley-based tensioning—introducing friction, backlash, and delay—the QS-BT1 goes direct. This means smoother transitions, faster responses, and no dead zones. It translates torque into tension with a level of nuance that makes mid-corner corrections and late braking not just effective, but physically intuitive.
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Independent Dual-Channel Control Most belt tensioners either pull evenly or rely on primitive vibration patterns to simulate G-forces. The QS-BT1 gives each shoulder its own motor, allowing for asymmetrical effects—like traction loss on one side or weight transfer in a slide. It’s the difference between “feeling something” and “feeling what’s happening.”
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Versatile Integration with or without Motion Unlike systems that depend on a motion rig, the QS-BT1 delivers standalone impact. Yes, it pairs beautifully with motion platforms, but it also elevates static setups by simulating forward forces—something even most 3DOF rigs can’t nail. Add in the RGB indicators and quiet operation, and you’ve got something that fits into any setup, any time of day.
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Built-In Safety and Comfort Engineering With smart voltage matching, Motion-Lock integration, and software watchdogs, this thing is engineered like it’s going into a real car—not just a game. Even at full tension, the force never feels unsafe or unpredictable. And with low-friction inserts for your seat belt slots, it doesn’t fight your rig—it flows with it.
Pros and Cons
| Pros |
Cons |
| Delivers 200N per channel with minimal delay |
No integrated seat belt included |
| Works with or without a motion platform |
Setup requires cockpit compatibility awareness |
| Independent control of left and right shoulder tension |
Limited native console support |
| Quiet operation suitable for long night sessions |
Specifications
| Specification |
Value |
| Power Source |
4A/115VAC, 2A/230VAC |
| Rated Power |
321 W |
| Pulling Force |
20.5 kg / 45 lbs / 200 N per channel |
| Interface |
USB |
| Channels |
2 Independent |
| Main Unit Dimensions |
561 x 99 x 138 mm |
| Main Unit Weight |
12 kg |
| Power Supply Weight |
2.8 kg |
| Box Dimensions |
660 x 255 x 180 mm |
| Box Weight |
19 kg |
| Supported Operating Temp |
+5°C to +35°C |
| Computer Compatibility |
Windows PC |
| Motion Platforms |
QS, PS, HS, and 3rd party (with brackets) |
| Included |
Main unit, USB cable, power supply, adapters, Motion-Lock cable |
| Not Included |
Seat belts, cockpit, bucket seat, remote switch |
Qubic System QS-BT1 Belt Tensioner Compatibility
The QS-BT1 Belt Tensioner supports a wide range of hardware thanks to its USB interface and integration with QubicManager / ForceSeatPM. It’s fully compatible with QS motion platforms like the QS-210, QS-220, QS-V20, QS-S25, and Next Level Racing® Motion Platform V3. Seat movers like the QS-CH2 also work with it, but installation must be precise—only to the top frame near the pivot point. It also supports 3rd-party cockpits using a universal adapter set or custom brackets. That said, not all aluminum or tubular cockpits may fit out of the box, and you’ll want to check slot and belt compatibility before installing.
Platform-wise, the QS-BT1 is controlled exclusively through Windows PC. While Gran Turismo 7 is technically supported through a PC telemetry relay, this is unofficial and may change without notice. The device is not compatible with consoles directly, and there’s no native support for Xbox or PlayStation hardware. Telemetry-based software like SimTools or SimHub is also unsupported—QubicManager or ForceSeatPM is mandatory for full functionality, tuning, and effect handling.
