Typically the tiers correspond with how exceptional and how highly effective a footwear is. Rate 5 certainly is the lowest and even tier zero is the finest.
You'll want to pay attention to the rate of the sneaker when selecting to use a Repair or Deadstock Station and also Sneaker Energy or Sneaker Shine. In case you try and make use of the wrong rate shoe using the incorrect rate station, power, or sparkle, then it is just not work for you.