Aftermarket Spare Tire Kit for 2024 Prius Prime

I'm still waiting to hear back from ModernSpare and get their thoughts on this issue, but I don't agree with your statement that all of the shear forces are handled by the studs. That would be true if the wheel was free to slip or rotate on the hub but it is clamped together and the friction force between the wheel and the hub provides strong resistance to shearing forces. I agree that a tight fit at the hub center would be ideal but not sure how important it is for a temporary spare solution.

KH

 

It has been my understanding that the lug nuts on a hub centric vs lug centric wheel are different in design/shape. Is this accurate?

 

After market wheels designed to fit a variety of vehicles are usually lug centric. From Discount Tire:

"While lug-centric wheels are centered around the lug nuts rather than the hub bore, they can be safely installed without worry"

I think the lug centric design spreads the loads across the wheel/hub interface and the studs without the additional load bearing capacity of the hub.

Bottom line is I don't think we have to worry about shear loads when mounting a lug centric wheel from ModernSpare.

KH