Wheel Bases

Direct drive wheelbases: from entry torque to high-end strength

A wheelbase sets the tone of your entire sim racing experience. The motor is what translates every kerb, every weight transfer and every loss of grip into something your hands can feel and react to. Get this choice right and everything else in your setup becomes easier to tune. Get it wrong and no amount of software adjustment will fully compensate.

This collection covers the full range of direct drive wheelbases, from accessible entry-level units around 8 to 9 Nm all the way up to high-torque systems pushing 27 to 28 Nm. The key is matching torque output and mount style to a cockpit that stays rigid under load. Not sure which cockpit tier fits your wheelbase? Start with the Simgasm tier guide and this rigidity explainer.

What direct drive actually means

Most sim racers have heard the term but fewer understand what makes direct drive fundamentally different from belt or gear-driven systems. In a belt-driven wheel, the motor output passes through a reduction mechanism before reaching the steering shaft. That mechanism smooths the signal, which sounds like a good thing but in practice filters out exactly the information you want: the small, fast feedback events that tell you what the tyres are doing at the limit.

Direct drive removes that mechanism entirely. The motor connects straight to the shaft, which means the signal arrives unfiltered and with almost no latency. The result is a wheel that tends to feel more alive at low force settings and more communicative at the limit. Many drivers find it difficult to go back to belt-driven hardware once they have experienced this difference, though personal preference and driving style always play a role.

Understanding torque: Nm is not just about strength

The number that dominates wheelbase conversations is Nm, or Newton metres, which measures rotational force. The common assumption is that higher Nm means a heavier, more physical wheel. That is true at the extremes but it misses the more important benefit of torque headroom.

When you run a wheelbase at or near its maximum output, the motor has less room to express fine signal variations. When you run the same wheelbase at a more moderate percentage of its maximum, there is generally more dynamic range available for subtle detail. This is why a higher Nm base running at moderate settings can feel more nuanced than a lower Nm base pushed to its ceiling, though this varies between hardware and software combinations.

The practical implication is that buying slightly more torque than you think you need is rarely a mistake. You are not buying strength, you are buying headroom.

Entry direct drive: 8 to 12 Nm

The 8 to 12 Nm range is where most sim racers make their first direct drive purchase and where the value per dollar is currently strongest. Units in this range deliver everything that makes direct drive compelling: low latency, unfiltered feedback and a noticeable step up from belt-driven hardware. Brands like Conspit, Simagic, Moza and Asetek all offer competitive options in this bracket.

For most driving styles and most car classes in iRacing or Assetto Corsa Competizione, 12 Nm is enough to feel everything you need to feel. The step to higher torque becomes relevant when you are primarily driving open wheel cars, when you want more headroom across all car types, or when you are building a rig you intend to keep for many years without upgrading.

Mid-range and high-torque systems: 18 to 28 Nm

Above 18 Nm the conversation shifts. At this level, the motor has enough output to more closely simulate the steering loads of real racing cars in high-downforce configurations. Formula cars, prototypes and GT cars at high speed all generate steering forces that lower Nm hardware can only partially replicate.

There is also a physical endurance dimension that comes up less often in reviews. Driving at high torque for a full race stint can be genuinely tiring. Some drivers find this immersive and realistic. Others find it costs consistency over long sessions. If you do endurance racing, that trade-off is worth thinking about before committing to a 25 Nm or higher system.

Mounting: the decision that affects everything else

A wheelbase purchase is also a mounting decision, and this is where many buyers lose money by thinking about it too late. The three common mounting methods are front mounting, side mounting and bottom mounting, and they can produce meaningfully different results in practice.

Front mounting attaches the wheelbase directly to the front face of the rig frame. It is generally the stiffest configuration because steering forces transfer straight into the structure without leverage working against the connection point. Many high-torque users prefer front mounting for this reason.

Side and bottom mounting offer more adjustability and work well at lower torque levels, but they can introduce a small amount of additional flex at the mounting interface. At higher torque levels this may become more noticeable, depending on your frame and mounting hardware.

Simgasm offers both a front wheel mount and a bottom wheel mount to suit different rig configurations. Choose based on your frame geometry and the torque level you are running. Browse all cockpits to find the frame that pairs correctly with your wheelbase choice.

Rig rigidity: the hidden variable

A stronger wheelbase can expose weaknesses in the rig underneath it. At lower torque levels, a moderately rigid frame may absorb small amounts of flex without the driver noticing. At higher torque levels, that same flex can become perceptible as a soft or slightly disconnected feeling in the wheel that FFB tuning alone will not resolve.

If you are planning to run a mid to high torque base, read the rigidity explainer before finalising your cockpit choice. Connection points, profile stiffness and the wheelbase mount itself all contribute to how the complete system feels. Getting the rig right first makes the rest of the setup significantly more straightforward.