Unsure what your point is ... IIRC both removable BMX V-brake posts can be either M10 or M8 ... it's U-brake posts which are different, they are usually M6 or M8.
Normal removable canti posts should work on an adaptor meant for M10 posts.
Just that a lot of BMX frames already have removable posts, a lot of people ride brakeless. So you wouldn't need to hack anything?
I've no idea about bolt sizes though. I'll go with whatever you say
Unsure what your point is ... IIRC both removable BMX V-brake posts can be either M10 or M8 ... it's U-brake posts which are different, they are usually M6 or M8.
Normal removable canti posts should work on an adaptor meant for M10 posts.