A thicker oil (e.g., Phil Tenacious Oil, or Chain-L chain lube) might be the easiest - will go into place via capillary action, can wipe off excess, and no need to disassemble.
I've disassembled and overhauled used brakes before, which was fun (and a trip) but it's a fair bit of time.
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"c" is not a unit that measures tire width