I use old tires on the trainer, but just shelled out for one of those Continental trainer tires for DH. That Cheese Whiz colored tire is one of my new favorite bike things! DH is bigger and stronger than me, and manages to "squeak" every tire he's ever put on the trainer, even when he's just spinning. Makes it really aggravating to ride the trainer with him! With the Conty, no more squeaks!