I would like to know what everyones thoughts are on stand over hight verses top tube length, but first let me tell you were I'm comming from. Earlyer this season I had the chance to take a friends '05 15 inch rockhopper for a decent ride. Got real muddy on a horse path around a local lake; I was hooked. Fast forward to me now having put a way the cash for one of my own. This bike will be for off road riding in pastures, hay fields and were ever else I can find to go in southwest Iowa. I went in to a LBS and told them what I had road and what I was looking for. Salesman was very helpful but said I should be more concerned with the top tube length then the stand over hight. I know I need to ride them both and see what one feels better, but I live 90 miles from the nearest shop and I want to have as many ducks in a row as I can before I go in. The guy at the shop was very good and didn't try to push me one way or the other, but he would have to order a 15 inch bike if that is what I wanted. Sorry to ramble.