Q: How is the ride on 18-inch off-road wheels compared to the stock 19 or 20 inch?

Calmer over rough surfaces. Dropping to an 18-inch wheel with a 255/55R18 tire adds sidewall, which soaks up sharp impacts and broken pavement better than a low-profile OEM setup, and it adds rim protection as a bonus. You trade a little steering crispness for comfort and durability, which is the right call for gravel roads and potholes. On smooth highway it still rides quiet thanks to the Geolandar’s touring manners.