MATH

 

 

 

The way I see it is that the contact between (a) the nut and the wheel, (b) the nut and the stud thread, and (c) the stud and the stud anchoring surface are factors that will keep the wheels in place. The wheel to hub contact area (the area in question) provides a static resistance to the force applied by the nuts to the studs, just like Olegator explained.

 

 

The reply from Enkie is that this was intentional.


This is from the Enkie Japan:

"1. To have outer mounting are:a to be fit on vehicle hub side. If only inner fits on hub, we usually have the problems; lug nut looseness, hub bolt break and wheel damage (break) at center part.



2. With tightening by lug nut, inner part is strained and it works to avoid lug nut looseness by spring effect. ---- Same concept as steel wheel.



For your reference Toyota OEM wheels have gap similar to PF01."

 

Very interesting!! We all learnt something new, thanks, Pete!

 

Cool!

 

Interesting. Hey Pete, I also remember reading on the brochure that the PF01 (versions with the lip) are a "reverse mount rim".