Originally Posted by rickB52
It looks like your 150 has 20" rims/tires. If you go with the Gear Wheels you will need to go with the 20x9 however not sure your stock tire will work... the stock tire (P275/55R20 111S) is made for a much narrower rim like 8". I would place a call to Gear -American Tire Distributor to validate recommended tire size for their 20x9 wheels...
A 275 width tire will easily fit on a 8" or 9" wide wheel. Hell, it would fit on a 10" wide wheel, it would just look weird.
The 275 width tires on my last set of wheels for my Formula are 275/40/17 on a 17x9 rim - this was a factory size. It will be fine.