Where to find the model and serial on a Spirit Fitness treadmill?

The belts for treadmills are largely universal in design. Simply measure the old belt and order one of that specification. That is the way I handle it.
 
If I purchase a deck belt without the -02 would it not physically fit to the treadmill deck?

It will physically fit however, the friction coating of the treadmill deck was changed during the manufacturing of the treadmill which could lead to the treadmill deck wearing down faster when using the treadmill with the incorrectly specified deck belt.
 
Question: does spirit still honor the lifetime frame warranty for residential treadmills if they were purchased second hand? This is for a friend who picked up one from the marketplace.
 
It will physically fit however, the friction coating of the treadmill deck was changed during the manufacturing of the treadmill which could lead to the treadmill deck wearing down faster when using the treadmill with the incorrectly specified deck belt.

Its intresting the way they discussed the friction coating for the treadmill deck. I would have never thought of that it would cause the deck to wear at a faster rate.