Rear brake drum replacement?

At how many thousand is the rear brake drum replacement done, friends? I haven't changed my car at 230k since I bought it. I found Bosch and trw brand on the internet. I'm thinking of changing.

There is no specific mileage. We do not know how many thousand you are using, of course, it is changed in 3-4 pre-changes on average. if it ends, when you press the brake, you will hear the sound of rubbing against the metal from the back.

rear drums wear out very late, but it also depends on the driving style. the best thing to do is to remove the drums, check them and do a cleaning, if it's almost finished, you replace it.