I just put new turfs on my 770. Well, the fronts were only a couple years old, but the backs are brand new Titans. Nice deep tread blocks, almost a mix between the paper thin Firestones (factory tires) and a R4. I love them. These were blemish tires, so the T and the N are rubbed off. Got a decent deal, but be prepared to pay $$$. I put tubes in as well for a grand total of $1100 for the back tires only.