The bolts will bend to a certain degree (to conform to the wheel seats) and then snap if the combination of the bending stress and shear stress due to elngation exceeds the yield strength of the bolt. As such if the bolt location are not controlled accurately enough for on the hub (as there function is not for locating, only for providing clamp-load) then the conical seats in the wheel, which is stiffer than the studs, will force the bolts to bend once enough friction has been created to prevent the wheel face from slipping across the face of the hub. Therefore if you are not centered as the torque is applied, you won't ever be. The rings are an extension of the hub and will provide a stiff enough locator to overcome the stiffness of the studs and thus will ENSURE the the wheel stays centered regardless of the stud misalignment. Consequently, sheaper wheels with poor quality control on the bolt hole tolerancing can cause recurrant stud breakage.
?FYI, I have the prints for the Contour hubs, my company made them (SKF) and they were made in our plant in South Carolina. So I'm CERTAIN I have more info than you n the tolerancing for the studs versus the tolerancing for the wheel hub pilot.
Go f#$k yourself - You're the idiot.
