I have 17s on my xs650, but I don't have enough miles to give a good review of them. Front is a 17x3.5 and rear is 17x4.25, 120/70 and 150/70 to keep tire heights close to stock. In the short runs I've been on so far it seems nice and stable up to 60, turns well, but is a little heavier feeling at low speeds. Once you get past about 20mph the feel is about the same as other old bikes I've ridden. But I'm also running big piston forks, 24.8* of rake and 30mm offset on the triples, and a slightly longer than stock swingarm with monoshock. For all the changes I made I'm happy with a little heavier feel at low speed with good stability at higher speed, but I can't say if it'll work as well when all is stock except the rims.
