It says it's a Moser 9-inch.

Something wasn't installed or part-matched correctly.

Wheel hop. It will break any rear end.

look at the pictures at the end of the video. they are factory size wheel studs...

7/16" or 12mm wheel studs do not handle much abuse. That wheel hop did them in quickly. An upgrade to 1/2" studs is the most common and best way to go but even they have limits. The car doesn't look like it's fast enough but 5/8" drive studs is the best way to go.

At least they broke right off the starting line and not half way down the track. What gets me is he broke the wheel studs off, why did the rotor still fall off? Even without wheel studs, the rotor should stay on the axle enough that it shouldn't fall out of the caliper.

There are plenty of wheel studs bigger than factory. But all 10, all at once?

The issue does not solely lie upon their size or fact of being OEM.

There is so much safety factor built into the factory studs its silly. This is not the fault of the studs. Most likely a bolt pattern mismatch, b stud/lug mismatch, or most likely, the lugs weren't tightened to spec.

They broke in shear. Fasteners should never see any shear unless either the joint was designed incorrectly, or the bolts weren't tightened to their spec.

Remember, you brakes develop more torque than your engine and drivetrain.

John

Nobody knows the true cause as why they suddenly failed during the wheel hop. They could have also been over tightened with an impact gun which will stretch the stud and fatigue the metal.

ill stick with my 5/8 studs...

Look at the back side of your 5/8 studs. You will probably find that they are only 1/2 inch where they screw into the axles.

Not mine. I bought my axles predrilled for 5/8" studs. They screw in with 5/8" threads.

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