Sack truck wheel

The original wheels on my Wolfcraft folding sack truck were worn out. I was unable to find any suitable replacement wheels of the right diameter and thickness to fit, so designed and printed these.
The wheels are in two halves which are held together with M5 x 30mm screws and nuts. I used stainless steel.
The tyre is held between the wheel-halves.
Each wheel needs two ball bearings, 18mm o/d 6mm i/d which are a press fit.