Ive been using the Michelin City Grip tires in a 100/80 front and 120/80 rear and it has been great! Just switched to the City Grip 2's last week (supposed to be even better water tires, and longer life than previous tires). I get about 2000-4000 out of a rear and 6000-8000 with a front. Just a pro tip, the bike does better with a 120/80 rear. On average a 120 rear is about 3-5 lbs lighter than the stock (City grip 120 is 4lbs lighter!!) Dunlop 130 or other 130's. I've had 130/90, 130/80, 130/70, and 120/80 of different tire brands, on the rear of the ninja 250, and all in all, the 120/80 performed the best in the corners and at higher lean angles and braking and acceleration felt better.