Wheels_HO_03_37in5

HO-scale 3'1.5" diameter 3-hole disc wheels in 2 handling cages of 4 axles each, so you get 8 axles. If you need that many, it should be better value per axle than the single cage of 4 axles which I uploaded a while ago, though how much better value depends on Shapeways' pricing policy, which can change from time to time.
Pinpoint distance is 24.5mm.
This model is offered for sale immediately because the wheels in a single pack were fine when I tried them, in smoothest fine detail (see the picture on that model) and the design here is the same. Break the cages carefully to get the wheels out, they're trapped in but not joined to it.
Flange depth is only about 0.5mm which is pretty fine.
UPDATE 2021-12-10 Increased the flange depth to about 0.8mm, File Version 03
UPDATE 2022-02-09 Decreased the back to back by about 0.5mm, File Version 04