@rrtbike thanks, I actually don’t know how long it should be, but that looks like it is pretty nice! How long is it? I can compare the length to a 26” one.
The bottom bracket shouldn't be any lower to the ground on a 24" then a 26", correct? That's compensated for on the frame, even all of my original Schwinn 20" bmx bikes have 6 1/2"(165mm) crank arms, that's the most common length used. Unless I'm wrong, but 6 1/2" should be the correct original crank arm length. I believe it then drops to 5 1/2", which would be way to short.