I just picked up a used trailer with a pod on it for $200. It has 8 inch wheels and I was told it has been to Fl twice behind a car doing 70 so it sounded OK with me. I measured the 8" wheels and found them to be a little over 18" dia, compared to my 12" trailer wheels being 20". With that said I talked to a gentleman from NY that had a trailer for his Spyder with 8's and he had over 54,0000 on it, so I think 8's will be find.