I know of at least one person running BMW 18 inch wheels on a GTO.05GTO said:BMW's 5 lug wheels are 120mm, I am not sure if the offset is the same as GTO.
Here is my source; http://www.ronalusa.com/cars.html
Do you have any specs on the centering rings, or where you got them from? I am bidding on some 3 series rims with snows.MIC1008 said:i picked up some alloy wheels from discount tire. very cheap. they look pretty similar to the factory wheels. their computer doesn't show that it would fit the gto but we ordered them anyways. they fit fine with no problems. the 16 inch wheel clear the brakes and there is no rubbing. they did need to get a custom set of centering rings. $800.00 for snow tires with alloy wheels. not too bad.