A friend asked me if I could fix his son's Playmobil fire engine from 1996 that was missing axles. Since I couldn't find anything, I designed my own. Just publishing it here if by any chance somebody else needs that part (even though I doubt it!).
The wheels and tires (printed in TPU 94a) are from https://www.thingiverse.com/thing:4276136.
Printing instructions: print with PETG for more strength and flexibility with (organic) supports.
The author marked this model as their own original creation.