It is a solid axle, so I assumed 9mm.
But another 9mm axle fit so it isn't the dropouts.
Given what's been said about safety, I'm not sure I necessarily trust myself to file it precisely and safely.
I assumed 9mm
There are quite a few ⅜" axles out there, mainly on cheap BSOs made for the American market but they leak into other markets too.
Needn't be perfect, a little bit on both side sufficient.
I have yet to die tho, will keep you informed if I do however.
@tbc started
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It is a solid axle, so I assumed 9mm.
But another 9mm axle fit so it isn't the dropouts.
Given what's been said about safety, I'm not sure I necessarily trust myself to file it precisely and safely.