Haha wow that's a new one... 1st, never go back to that dealer again. I'm 100% serious. I'm not even sure how the guy that told you that manages to breathe on his own. 2nd, any, yes any, motorcycle tire with the last number of 21 will fit on the front. The rear will fit anything probably 120 or 130 and smaller on the first number (width) and 18 on the last number (rim size). In other words, 90% of all off road knobbie tires in production will fit. I'd suggest getting a DOT approved tire. Dunlop D606 front and Pirelli MT21 rear is what I personally use on both my bikes. The MT-21 wears fairly quick if you ride on the street a lot.