1972 Blazer Bigger wheels - bigger lug studs

[Stoime]

hello, I recently put 20x10 XD wheels on my blazer with 35" nitto trail grapplier MTs and 1.5" spacers on the rear with 7/16-20 lug studs all around. I backed the truck up about 30 ft and one of the lug studs on the spacer sheered off. I removed the spacers, but am wondering if I should upgrade the 7/16-20 lug studs in the rotors and drums to 1/2-20.

I was wondering if anyone has ran bigger wheels and had any problems sheering 7/16-20 lug studs with bigger wheels on rotors, drums and spacers? Also need to decide if I am going to run spacers too?

Thanks