How much life is left in older brake parts?

[FordKid]

So like most of us here I'm working on an older bike. I was installing new bearings in my front wheel last night and I noticed the MAX 111 DIAMETER on the inside of the drum. I decided to quick measure it and I'm about 109.979.

So the question I have with those that have had experience with setups like this is given a mostly low braking route, how much life can expect to get from these drums?

I plan to do a disc brake conversion in the front eventually but even the rotors that I have only have about a millimeter each left before it is technically out of range.

 

[Hurco550]

Depending on your riding style, over a MM should get you plenty of life left. Especially since your planning on swapping over to disc later on.

 

[crazypj]

If you don't let drums get rusty so needing cleaning (and thinning liner/opening diameter), 1.5 mm of cast iron will last a few decades or couple hundred thousand miles of use