I was told by a very reputable shop that the Goldwing is one of the few bikes that is very particular with tire sizes. They very strongly recommended staying with the stock tire sizes and I have not been disappointed. My bike also sits a little too tall for me as well. I tried taking air out of the suspension but that just made the ride rougher. About the only way that I know of adjusting ride height on the older bikes (mine is an '83 Interstate) is to get a custom seat that is shorter. If anyone has anything better to offer, I will be interested. Thanks.