The Wheel Fitment feature is a useful tool for car enthusiasts who want to upgrade their wheels. It allows users to input their car's make and model, and then provides a list of compatible wheel sizes and offsets. This feature takes the guesswork out of wheel shopping and ensures that the new wheels will fit perfectly on the car.

Tyre Stretch is another feature that is popular among car enthusiasts. It allows users to see how different tyre sizes will look on their wheels. This feature is particularly useful for those who want to achieve a more aggressive stance or a wider look for their car. By inputting the tyre size and wheel size, users can see how the tyre will stretch over the wheel and get a better idea of how it will look.

Rolling Radius is a feature that calculates the difference in size between the original tyre and the new tyre. This is important because it affects the car's speedometer reading. If the rolling radius is significantly different, the speedometer will be inaccurate. This feature helps users choose the right tyre size to ensure that the speedometer remains accurate.

Overall, these features are designed to help car enthusiasts make informed decisions when it comes to upgrading their wheels and tyres. They take the guesswork out of the process and ensure that the new wheels and tyres will fit perfectly and function properly.