the LZ came with 245/45R19 tires. If you don't have an LZ, you have 18" rims, but it will accept the 19". with the LZ, the proposed tire will be 1.1" greater in radius and will cause the speedometer to be slower by about 5 mph. If your original tires were 235/50R18, the increase will be 1.4" in radius. and the speedometer will be about 8 mph slower. With either, the tread width will be fine.
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