The RideStyler FitGuide provides support for product recommendations based on the selected vehicle and tire size. The Tire and Wheel Options tabs in the FitGuide are disabled by default, but will show up as soon as you enable at least 1 brand (for each type of product) in your Account Settings.
Note: Brands you enable will appear in all relevant RideStyler products, such as the Visualizer and the FitGuide.
To learn how to enable brands on your Account, read the article Managing Your Wheel & Tire Brands.