I have them on the front of my blaster, they're awesome. I like them better than the Holeshot XC's I had on it before. Alot more predictable and smooth cornering, and WAY more grip in the soft stuff.
ive seen them at my local yamaha dealership and they have tall lugs and r really soft they should hook up well
also cfed posted a thread about these tires a while back idk if he got some or not