2002 Pontiac Grand Am SE came with 15 inch factory wheels what size tire is needed for 16 inch replacement rims Is it possible to put 16 inch rims on that model of car?

215/50r16

Actually you can do this. I just put 15" tires and rims on my mom's car because one of her chrome rims cracked and couldn't be fixed and it drives and rides like a dream. The tires don't rub or anything.