Tires: a pimple bump on my tire, manufacturing process, bulge

Question
hi i recently while detailing my car noticed that i had a bump on
my tire. what causes this it looks like a pimple bulging out of the
side wall and thats odd because i have low pro tires that protect
my rims

Answer
Joseph,

If the bulge is circular, then this is probably a bit of air trapped in the tire during the manufacturing process.

But if the bulge is somewhat radial then it is probably a rim pinch, caused by the tire being damaged by impacting an object.

In either case, the tire needs to be replaced.