Sixherbst

Being new to the 370 model I decide to add spacers to my stock set up. 20mm to the front and 25mm to the back. Stock rays. After install I loved the flush look but noticed the rear wheels appeared to have negative camber. I hope I'm using the correct terminology here. The top of the wheel is farther in while the bottom of the rims is farther out. I'm wondering if I can make my own adjustment. If so how. I honestly didn't think that adding small spacers would cause that. I used a level on the rims and it appears that the top of the wheel could be adjusted out about 1/2-3/4 inch. Any advice would be appreciated. Thanks