That's not really a good reason to use spacers. Pushing the wheels out like that to widen up the stance will put extra strain on the bearings and cause them to wear out quickly if not fail and cause your wheels to come off. The proper use of spacers is because say you have a wheel with 10 mm more offset (which pulls the wheel in) so you put a 10 mm spacer on there and push the center of the wheel back to where it was for a stock wheel. The net result might be a wheel with a wider stance but you have not just cantilevered a wheel further out on the bearings. Wider wheels is fine but try to balance it as much as possible and not put all the extra weight on one side.