You are going to need LOTs of luck. You might do a search as Clint Fast posted he had a set of 5 of what you are looking for depending on your application. Not putting the bolt pattern as well as the sizes you are looking for is for sure not a way to find what you are looking for. That said, 16" gravel tires are extremely rare on earth and almost impossible to find in the US. Nobody imports them and Clint got his from Demon Tweeks in the UK. Extremely unlikely you will find what you want and any spares if you do find this will also be almost impossible. You really need to do with most people who build cars for gravel and come standard with 16" or bigger wheels/tires and that is to change to 15's. Depending on the application, you may also have issues with clearance of gravel brakes. One of the reasons for SP class to allow people do change to 15" wheels/tires. See you are doing rallycross but, just the same, get some 15's if you have to have rally tires, otherwise just get a set of snows.Looking for a set of 16" wheels and some used gravels for rallycross. Budget is around $650 for the set. Please let me know if you know of anyone selling. Email is andrewc3758(at)gmail(dot)com Thanks!!