I would hate to think how many miles in the grass I had on the foam wheels on my Great Planes Super Sportster. If I can get as many miles out of these VF ones, I will be happier than a clam. It don't bother me at all to use the foam wheels. They might not last as long as a set of rubber dubro's, but I will use them tell there nothing left of them, or no Plane left to keep them on.