I have a '95 ZX-6R. When I got it, it had a 180/60 Dunlop 207 on the back that wasn't rubbing. The front was the stock BattleAx. I replaced them both with Rennsports, 120/60 on the front and the stock 160/60 on the back. The handling was vastly improved. I'm not sure how much the size of the rear tire had to do with it.