dang - welded in 3/16 spacer ring on wheels and still the brakes pulsate

lol - oly because i hate having 2 diff types of wheels on the car and i only have these 4 wheels. the guy i bought it from told me these would work on the front with that adapter ring so thats why i tried it. 1 hour and 15 bucks in metal isnt a big deal. i just dont know why they arent working?