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Discussion Starter #1
Why is one stud on each wheel painted yellow on the end?
 

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That is the one the locking lug goes on.
 

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Yellow Stud

Good question, just need the reason for yellow on one stud, is it the heavy spot?
Someone said to put the locking nut on the yellow stud.
 

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It is the high or low spot on the hub, they just failed to reference an spot on the rotor. Mark your brake rotor to match that yellow dot. Brake pulsation can be possible if the rotor is removed and not installed back in the same position. Hope this helps on the subject. Generally the rotor will have a very small yellow line near the hole that slides over the lug stud with the yellow marking.
 

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We were told at a Ford class that the painted stud is the light spot and the valve stem on the tire is susposed to line up with it for proper balance from the factory. That's probably why some people recommend putting the wheel lock in that position since it's heavier than a lug nut. After it's been sold and has some miles on it the light spot probably changes and it doesn't really make any difference.
 
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