Tire Rack can be a good source to look up oem tires and wheels.
It appears as though those are Goodyear Eagle LS 2 tires which are one possible OEM tire/wheel on the base 28i. Just look at the tire size itself on the sidewall and it should say 225/50 R17 if that's them. The 17 at the end is the wheel/tire size.
2015 335i MSport -MPPK -Borla ATAK -E.R. Charge pipe
Was - 2013 X1 35i Sport - Dinan tune / 2009 X6 50i Dinan badged