Combined Open RC Tractor Wheels
These wheels are for the Open RC Tractor by Makit (https://www.myminifactory.com/object/openrc-tractor-26360) If you don't have any flexible filament for the wheels, and don't want to get any, than these files will help you. The tires do not fit on to the rims without a flexible tire. You can try heating up the tire to fit on the rim, but without a heatgun this will be very difficult. I just combined the tires with the rims on Meshmixer.