oem-r

Hey just need a quick confirmation as to weather these wheels im interested in will fit and if theyll clear my 4 pot callipers. car is a skyline gtst mspec with 4pots. the wheels im iinterested are 17x8 with offset of 30p, how will these sit on my car, will i need to roll guards? and will they clear my brakes.. noob question it may be also whats the least widest tires i could strech onto a 8 inch rim? 215? any help or advice would be much apreciated.