I got a cheap second hand bike for my son as its not worth repairing his current one as he outgrew it. At the time, I knew it needed a new inner tube which I was going to replace.
Only now I noticed that the front brakes don't work. I can see they are disc brakes but the disc is missing. The only disc I can get locally has mounting holes. The bike has nowhere to mount it to. The calipers? open and close just fine.
I thought about changing the brakes to the type that works against the rim but the problem is the same and there is nowhere to mount those brakes (holes are missing and I don't want to make them)
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Assuming I can install a disc rotor do I need to get a specific kind or something else to mount it to? Do I actually need a different rim?