Check this out
http://x3.xbimmers.com/forums/showthread.php?t=1151427
This guy using 275/35/19x10 ET+38 effectively. He went lower on the aspect ratio to 35 instead of 40. The wheel fit nicely. Not hitting the struts. But not sure if it will rub the inner fender on full lock turn. Some wheels would say they’re 19x9.5 but when you look at the dimensions, the details would say 19x10.