What are the minimum thicknesses for brakes

I'm getting my front and rear brakes done and am trying to get the drums and rotors resurfaced but they are saying they are already at the minimum thicknesses. So I'm wondering what are the actual minimums with it still being safe. My back brakes are at 165k . Any input would help

 

Minimum thickness on the rotors is 26mm.

 

I think the drums state the max diameter on the inside. 256mm maybe?

 

Most shops don't like to resurface drums or rotors anymore because compared to cheap Chinese brake parts, it looks too expensive. That led to most shops selling or scrapping their brake lathes many years ago. So even if you ask to have it done, they don't have the equipment or sometimes the knowledge to do it.

With that many miles on the truck, I'd suggest investing in some decent replacement drums & rotors.

 

Its a judgment call for the tech. He has to anticipate how much metal will need to be removed to get down to a smooth surface. If the rotors are in good shape he'll only need to remove a little. If the rotors are dished, rusty or grooved he's gotta remove more. Sometimes after resurfacing you end up with a rotor that is too thin to put back on the car.

Not to mention that a thinner rotor will not absorb as much heat as a thick one, resulting in brake fade and warping

 

Yup, 256mm max