How to know when to replace rotors

[CombatYoga]

Is there a thickness tolerance spec for rotors that I should measure with calipers?
Or some other way to determine if they should be replaced?

 

[hamilton]

It's in the 14 user manual. 3 mm min thickness front, 3.5 mm rear.
warped or bent replace.

 

[(F5)]

When you can't slid the caliper off the disc without struggling for a couple of minutes. Otherwise its fine. Spend your money on a tubliss rear tube system.
And beer. Nice beer.