A Racing Wheel Is Not A Standard Pad
A steering wheel tester needs to show wheel rotation and pedal travel before ordinary button lists. Racing hardware often exposes the wheel as an axis, pedals as separate axes or triggers, and shifter paddles as buttons. This steering wheel tester separates those controls visually so you can see whether the browser understands the racing wheel as a usable controller.
A racing wheel test is especially helpful after installing drivers, switching between console and PC modes, or using an adapter. The same wheel may report different axes in different modes. The controller tester keeps raw values visible beside the wheel and pedals, which makes it easier to configure games that ask for steering, throttle, brake, clutch, and gear bindings.
The visual wheel angle is a browser proxy, not a force-feedback calibration tool. It shows the axis value that web software receives. If a wheel has 900 degrees of physical rotation but the browser maps it to a normalized -1 to +1 range, this page uses that normalized value to reveal center, direction, and proportional travel.