I am using Toyo Proxes tires in my 19" rims. It has been about 5 months and driving under hot tropical conditions, I ahve not encounteres any noisy problems or fast treadwear. Tire size is 255/50/r19 on all 4 tires. Would like to go staggered but road conditions in the Philippines are not suitable especially if I use my X5 as a daily car. I drive an 02 X5 3.0d euro.