The nitto 275/60's will fit fine on T wheels and won't rub in a straight line.
They may rub the frame if you take off ramps fast, but it shouldn't hurt the tire. They'll provide a good compromise between traction and tread life.
If you have sagging rear springs, the taller 275/60's (27.7" tall) will give a better rake than the too short nitto 50's (only 25.7" tall).
Also, the 275/50's fit funny on a 7" rim and will more likely rub more than the slightly narrower 275/60's.