Used my pinskates on over 100 degree pavement and the rubber outer part of the wheels completely shredded off the plastic hubs. Had them over 13 years.

I bought some replacement casters on Amazon but worried they may not work. I made sure the wheel part was the same spec so if the whole caster didn't work at least I could move the wheels over.

After ordering I found what appears to be a correct fit and will order those if the Amazon wheels don't work.

https://shop.servicecaster.com/Metric-Caster-Rubber-Wheel-p/scc-ts20s314-tprb-m1015.htm

This one has greater weight capacity and comes in multiple colors for same price:

https://shop.servicecaster.com/3-Caster-with-Polyurethane-Wheel-p/scc-ts20s314-ppub-m1015-m.htm

The stem is M10 thread and about 1 1/5 inches long. The original wheels are metric. They are 3 inch wheels and 1 1/4 wide or 75mm x 32mm. With a 10mm bore.

But if you have a direct replacement that is better priced than the Jabtecs please post.