Front is a 3.5x17 and rear is a 5.75x17 (Can fit a 200 rear tire). Used them for season and all I can say its a change you will never image. The bike flicks left to right so fast better then a R6 and I have a R6. Make a reasonable offer. I see Mag wheels selling for $1500. I have Galfer wave rotors I can switch out also if I don't sell them.