I am not totally sure if wider is better or what. I think the dunlops that came on my bike work great. I also here they were designed for the 4 stroke to handle the torque. That way they last a little longer for the po' people such as myself As for buying try this website. They have killer deals. www.accwhse.com (Motorcycle Accessories WHerehouse). I got my street bike tires there for $40 to 50 cheaper than anywhere else.