My TT Armor "The DogHouse"
If the 1 5/8" refers to just the wheel itself, they look to be the same size I have. They aren't too clear on the actual height, are they? The TT Silentcat fan is about 3/4" tall, so they should give you plenty of clearance. I did have to re drill holes for mine, the real trick was finding bolts short enough to work.