175/65/R16= 16"WHEEL TRIM REQUIRED. 175/65/R14 = 14" WHEEL TRIM REQUIRED. 175/65/R15 = 15"WHEEL TRIM REQUIRED. AN EASY WAY TO IMPROVE THE LOOK OF YOUR VEHICLE. TO CHECK YOUR TYRE SIZE YOU NEED TO LOOK FOR THE NUMBER AFTER THE LETTER R ON YOUR TYRE WALL FOR EXAMPLE.