Sim-Lab’s first direct drive wheelbases are no longer a preorder promise — the DDX26 and DDX39 are shipping to early customers now, months after preorders opened in late 2025. That alone makes them worth a look. What makes them worth a second look is the control architecture underneath: instead of the low-voltage FOC (field-oriented control) loop nearly every direct drive competitor runs, Sim-Lab built these around something they call TorqueSync — a 350V, 100kHz control loop. That’s a genuinely different approach to moving a servo motor, not just a new torque number on a spec sheet.
Two bases, one new control philosophy
The lineup is straightforward: the DDX26 delivers 26Nm and the DDX39 tops out at 39Nm, positioning it as a direct competitor to the highest-torque bases on the market — Simucube’s 3 Ultimate, Moza’s R21, and Fanatec’s Podium DD2. On paper, 39Nm puts the DDX39 in the same conversation we had when the Simucube 3 Ultimate shipped its 35Nm flagship earlier this year, and it undercuts that base on torque headroom while (per Sim-Lab’s own claims) targeting a competitive price point.
But torque numbers are the easy part of this story. Every direct drive manufacturer can wind a motor to hit a bigger peak figure — the real differentiator is what the control loop does with that torque under sustained load, and that’s where TorqueSync is the more interesting news.
Most direct drive wheelbases run FOC control at relatively low voltage (typically 48V–80V) with switching frequencies in the range of 15–25kHz. That’s a mature, well-understood approach — it’s why FOC dominates the category. Sim-Lab’s decision to run at 350V and switch at 100kHz is a bet that a higher-voltage, higher-frequency loop can deliver finer current resolution and faster torque response, with less heat generated per unit of torque produced. In theory, that means smoother detail at the edges of grip — the subtle wheel weight transfer you feel when a tire starts to slip — and better thermal stability during the kind of multi-hour stints we run at endurance events.
That’s the claim, anyway. It’s also exactly the kind of claim that only holds up after real hours on the wheel, not a spec sheet.
Why we don’t take torque numbers at face value
We’ve said this before and it remains true: a bigger Nm figure is marketing, not engineering, until it survives sustained load. Peak torque is trivial to advertise and difficult to sustain — what actually separates a wheelbase worth building a rig around from one that reads well in a press release is what happens after 20 minutes of hard cornering forces, whether the driver holds calibration without drift, and whether the case temperature stabilizes or climbs until the base throttles itself.
This is precisely why the TorqueSync architecture is worth tracking rather than dismissing as a gimmick. If a 350V/100kHz loop genuinely manages heat better than a low-voltage FOC design under the same torque load, that’s a real engineering advantage — not just a novel spec. If it doesn’t, and the higher-frequency switching just means more electrical noise and a design that’s harder to service, that’s a real problem for anyone whose rig needs to survive a 24-hour stint without a wheelbase fault. We won’t know which of those is true from a shipping announcement. We’ll know it after hours on the wheel.
Where this fits against the field
Right now, the direct drive conversation at the top end is crowded: Simucube’s 3 Ultimate at 35Nm, Moza’s flagship bases, Fanatec’s Podium DD2, and now Sim-Lab entering with a 39Nm option and an unconventional control architecture to differentiate itself. Sim-Lab isn’t a newcomer to the category — their frames and pedal hardware have been a fixture in enthusiast builds for years — but a first-generation direct drive base from any manufacturer, including one built on unproven control architecture, is not something we spec on day one. Driver stability, firmware maturity, and long-term support are earned over months of units in the field, not claimed in a launch post.
That’s not a knock on the DDX26 or DDX39 specifically — it’s the same bar we hold every new wheelbase to before it goes into a build we’re willing to put our name on. Torque figures are a starting point. What decides whether a base belongs in a Sport, Active, or Motion tier build is whether it holds calibration lap after lap, whether the drivers are stable across firmware revisions, and whether the case stays cool through the kind of session length that actually matters to sim racers who train seriously.
What we’re watching next
We track every new direct drive base that hits the market for exactly this reason. If early units of the DDX26 and DDX39 hold up as they reach more hands, we’ll run them through the same reliability checks every wheelbase gets before it’s approved for one of our rigs — sustained-load thermal testing, driver stability across updates, and real endurance-length sessions, not just a lap or two on a show floor. TorqueSync is a genuinely novel approach to a solved problem, and novel approaches are worth taking seriously, not worth taking on faith.
If you’re spec’ing a build and trying to decide between an established flagship and one of these newer entries, that’s exactly the kind of decision we walk through with clients every day — torque headroom, driver maturity, and how a base holds up over the session lengths you actually plan to run. Book a consult and we’ll talk through where the DDX26, DDX39, or their established competitors fit into a turn-key package built around how you actually race.