IBCoupe wrote:In fact, you could stand to go up to 245/50's.
No.
245/50 is a smaller overall diameter than 275/50. As the section width changes, the OD changes as well, unless you change the aspect ratio. The "50" means the sidewall is 50% of the section width.
Changing tire size to "lower" a car is a bad idea.
Stick with the same overall diameter. Wider is fine, but that means you'll just have to adjust the aspect ratio.
Realistically, you're running a perfect size as it is.