big wheels

Here in Australia 13's and 14's are trailer wheels and have limited sizes available with the quality of tyre you can buy that is all I would use them for! 15's are ok but again tyre choice is limited. 16's are just off the planet price wise, 17's are cheap and lots of choice of quality and still have a good side wall size. 18's are the biggest I would use as I like the modern look on a classic that is modified. 20 and over are for the kids I think, too big, cheesy and tacky, just how they like them!!