I highly doubt it will fit with the tailgate up it unless it is a really small ATV. You would need to go out and take some measurements of your machine and a few different heights. But most Atvs are closer to 7 feet. You need to measure up higher at the bumpers where it contacts too and not at the wheels. Also make sure you are not going to drive it through your rear glass. It will probably fit just not with the tailgate up.