BMX Foot pegs

My son wanted foot pegs for his BMX.

The correct diameter to be fitted on the wheel axle wasn't avalaible at the shop.
So i designed it.
And printed it with polycarbonate (color is flashy....)

There are 2 sizes:
13mm center hole to fit the rear axle.
8.9mm center hole to fit the front axle.

I didn't design any threads, as the axle threads are very very fine, so i'm sure it wouldn't have printed correctly.
So you have to "force" the peg into the axle, thus creating the thread like