What's the link there? Tyres aren't looser in one direction.
Njee, you are very literal aren't you! Is it literal, not sure if that's the right word. No offence meant, but you do miss the point some times! Aspergic?
To answer the question – not sure, I guess it depends on the tyre and to some extent if its on the front or back. I went for a night right in a mudfest with some trailrakers on I'd sorted in a hurry and put the rear one on the wrong way around. Zero traction. In the end I had to take it off in the dark in the middle of a muddy field and switch it around in order to make progress. I went from totally maxxed out effort wise and failing to keep up with my mate to miles ahead on half juice- night and day in terms of performance.