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Specialized Diagnostic

Steering Wheel & Pedals Test

Test your racing wheel rotation angles (900°/1080°), pedal linearity (Throttle, Brake, Clutch), and paddle shifters online for free on Logitech, Thrustmaster, and Fanatec.

Connect Logitech G29/G923, Thrustmaster, or Fanatec racing wheel...
No Racing Wheel Detected

Steering Rotation Angle

0.0°

Pedal Linearity Bars

If your wheel uses pedals over a separate input, values stay at 0% until detected.

THROTTLE (ACCELERATOR)0%
BRAKE0%
CLUTCH0%

Sim Racing Hardware Benchmarks

Rotate your wheel across full operating range and actuate all three pedal axes:

Linear Lock-to-Lock (Calibrated)

0° dead center resting angle; smooth linear progression to 900°/1080° stops; 100% full throttle & brake saturation.

Pedal Spiking / Drag (Wear)

Pedals fluctuate 1-5% at rest or jump erratically. Indicates dust in potentiometer gears or dirty optical sensor.

Encoder Slip / Off-Center (Fault)

Physical wheel is straight, but digital output rests at 15°–45°. Indicates cracked optical encoder disc or loose belt.

How to Get Started

Just three steps to run a complete controller test and understand your controller's health status.

01

Connect Controller

Connect your controller to your computer via USB cable or Bluetooth. If the browser doesn't respond, press any button on the controller to activate the connection.

02

Button Detection

Press each button in the visual interface and confirm the corresponding area lights up on screen. This helps troubleshoot unresponsive or double-clicking buttons.

03

Sticks & Vibration

Rotate the sticks to check linearity and drift issues; click the vibration test button to feel if the left and right motor feedback is working properly.

What would you like to do next?

Select a diagnostic calibration suite, deadzone analyzer, or high-frequency overclock tool.

Fix

Repair & Calibration

Calibrate zero-point offsets or follow step-by-step repair guides.

WebHID Calibration
Optimize

Game Deadzones

Calculate exact radial vs axial deadzone overlays for Fortnite, Apex, & COD.

Deadzone Calculator
Telemetry

Overclock & Circularity

Verify browser-observed update timing Hz stability and statistical circularity grades.

Hz & Circularity Tools

Need to check input frequency and latency?

Measure USB polling rate and millisecond response time across direct-drive sim racing bases.

Check Polling Rate Full Diagnostic

Related Diagnostic Tools

Trigger Pressure Test

Test analog trigger and pedal linearity.

Polling Rate Checker

Measure sim wheel USB report frequency in Hz.

Latency Estimator

Measure input delay & reaction speed.

Sim Racing Hardware Calibration & Sensor Mechanics

Sim racing hardware—ranging from gear-driven Logitech G923 systems and dual-belt Thrustmaster T300RS bases to high-torque Direct Drive wheelbases (Fanatec Podium, Simucube, Moza R9/R12)—demands frame-perfect input fidelity for precision vehicle dynamics in iRacing, Assetto Corsa Competizione, and F1 24.

Steering Encoders: Optical vs. Magnetic Hall Sensors

  • Optical Encoder Discs: Classic wheelbases use a slotted plastic optical wheel rotating between an infrared emitter and photo-detector. If this plastic disc develops micro-fractures, the wheel loses center calibration during high-speed counter-steering snaps.
  • Contactless Magnetic Hall Sensors: Modern direct-drive systems track a 360-degree diametrically polarized neodymium magnet on the motor shaft, delivering frictionless angular tracking with 16-bit resolution (65,536 counts per revolution) and zero mechanical degradation.

Pedal Sensor Technologies: Potentiometer vs. Load Cell

  • Rotational Potentiometers: Common in entry-level pedal sets (Logitech G29 pedals). They measure physical pedal displacement distance. Over time, carpet dust and metal shavings enter the plastic potentiometer casing, causing throttle and brake spiking.
  • Load Cell Force Transducers: High-end sim racing brakes (Fanatec CSL Load Cell, Heusinkveld Sprint) measure physical kilogram force pressure rather than travel distance, simulating real hydraulic automotive brake calibers. Test your load-cell amplification curve in the live telemetry bar above.

Controller Hardware Glossary & Tips

Stick Drift & Deadzones

Stick drift occurs when analog sticks register input without being touched. This is typically caused by physical wear in traditional carbon-film potentiometers. A deadzone is a software-level threshold (e.g., 5-10%) applied to ignore these microscopic false inputs.

Hall Effect Sensors

Unlike traditional ALPS potentiometers, Hall Effect modules use magnetic fields to measure stick position. Because there is no physical contact or friction between the internal components, they are virtually immune to wear-induced stick drift, drastically extending the controller's lifespan.

Polling Rate (Hz) & Input Latency

Polling rate is how often your controller sends data to your device, measured in Hertz (Hz). A standard Bluetooth connection yields around 125Hz (8ms latency). Overclocking or using a wired USB connection can push this to 500Hz-1000Hz (1ms-2ms latency), critical for competitive gaming.

Circularity Error

When you rotate a joystick along its outer edge, a perfect module should trace a mathematically perfect circle. Circularity error measures the deviation from this perfect circle. High deviations (>15%) can result in uneven diagonal movement speeds in FPS games.

Frequently Asked Questions

Everything you need to know about testing your controller.

How do I test my sim racing steering wheel and pedals online?

Connect your Logitech G29/G920/G923, Thrustmaster T300RS/T248, Fanatec, or Moza racing wheel to your PC via USB. Rotate the wheel left and right to its physical locks, and depress the throttle, brake, and clutch pedals. The live visualizer displays exact rotation angles (0° to 1080°) and pedal pressure percentages.

How do I verify 900-degree and 1080-degree rotation angles?

Turn your wheel from full left lock to full right lock. The circular dial visualizer calculates your total degrees of rotation in real time, allowing you to verify that your wheel software (Logitech G HUB, Thrustmaster Control Panel, Fanatec FanaLab) matches your hardware operating range.

Can I test load cell brake pedals and potentiometer throttle pedals?

Yes. The tool measures analog axis travel from 0.00 (0% released) to 1.00 (100% depressed) with 0.1% resolution, allowing you to identify resting brake drag, non-linear throttle jumps, and pedal potentiometer dust contamination.

Why does my steering wheel show resting center drift?

Resting steering drift is usually caused by an uncalibrated optical encoder wheel (common in older Logitech G27/G29 wheels) or magnetic sensor offset. Disconnecting USB, allowing the wheel to auto-calibrate on power-up, and recentering in driver software resolves center drift.

Does this tool test H-pattern manual shifters and paddle shifters?

Yes. Magnetic paddle shifters and individual gear gates (Gears 1 through 7 + Reverse) register in the digital button matrix to verify switch continuity and prevent missed shifts.

How this test works & its limits
  • This test reads your controller through the browser's standard Gamepad API — no drivers, no installs, nothing leaves your device.
  • Readings depend on connection mode: Bluetooth reports at lower rates than USB. Compare like-for-like (wired vs wired).
  • We measure the input reaching the browser — display lag and game-engine queues are outside this test's view.
  • A clean reading now does not guarantee no drift in-game: deadzones differ per game, and wear develops over time. Use the Drift Timeline to track yours.
  • This is a diagnostic, not a hardware-lab certification. For repair or RMA decisions, confirm with a second run or second tool.
Read the full methodology
100% Client-Side

All Gamepad API data stays in your browser. Zero tracking or data collection.

Instant Results

No downloads, plugins, or software installation needed. Works instantly.

Free Forever

No paywalls, subscription requirements, or hidden usage limits.