Tires for the Kawasaki Ninja 250
The Kawasaki Ninja 250 is a very popular bike for it's beginner friendliness and it's value. Two of the popular tires for the bike are Pirelli mt75 and the Pirelli Sport Demon. The mt75 is a 100/80 front and 120/80 rear. The Sport Demon is a 110/90 front and a 130/90 rear. The bike comes stock with Dunlop K630 at 100/80 front, 130/80 rear. The mt75 tires actually match the wheel size exactly. The k630's are slightly bigger for the rear. Supposedly, the old stock Dunlop tires were discontinued, so Kawasaki decided to use the next closest cheap option.
I cannot offer any performance comparison between the mt75 and the Sport Demon as I have not ridden the bike with Sport Demon, but I do know both are much better than the stock k630's. When we were doing maintenance on the bikes last week, I took a couple pictures of my ninja 250 with the MT75 and my friend's with the Sport Demons for a visual comparison of the 2 different tire sizes. Personally, I think the front with the Sport Demon looks a bit too large and doesn't look as good. Also, you should beware if you are considering getting Sport Demons for the ninja250 that for this tire size, you have to raise your front fender as the tire is too large.