Strange bike tech.

[clare at snyder.on.ca]

Somebody has to have attempted this before, so I'll ask the question
and see if they are on this list.
I want to install a rear bike axle in a bottom bracket. I have a 14mm
BMX axle, as well as a standard axle out of an old 12 speed mountain
bike. I'd prefer to use the 14mm axle for strength. I'll put the
races(cones) on backwards and I want to use the bottom bracket races.
What sise ball set do I need to make this fit? bottom bracket bearings
are too small

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