Is wheel center bore critical?

[redbarron55]

As long as the hub fits trough it is OK.
Trailer wheels as far as I know and have been able to fins are not HUB CENTRIC.
The lugs locate the wheel centered on the axle centerline.
These lug nuts need to be accurately torqued and often especially when new wheels are fitted or until the paint is worn off all of the mating surfaces, hub, back of the wheel and the seats for the lug nuts.
The wheels on the pictures Casita looked fairly new and had probably not been torqued since it left the factory.
It would be nice to know.
The failure still looks like fatigue fracture from loose lug nuts.

[Fallon]

Looks to me like loose lugnuts as well. Blame improper maintnance for that not the semi passing. Once those loosened up, the wheel started wobbling, then it went downhill from there.

As others noted, proper torque is critical.

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