Pizza and Pickle Wheels?

Picked my son up from daycare yesterday and he started talking about pizza and pickle wheels. I thought pizza wheels would be too messy and pickle wheels too sour. Nothing listed on Discount Tire or Tire Rack. Am I missing out on some bandwagon? Is my son crazy or am I just too busy yelling at kids to get off my lawn? Thanks in advance for any help

 

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Pizza

 

Pizza wheels or pizza cutters tents to be when you are running a skinnier tire than normal. Some folks do it when going up a size to avoid rubbing or needing to trim the frame. (It kinda looks like you are driving on pizza cutters)

No idea about the pickle wheels.

Also not sure why children in a daycare would be discussing this, but props to you for taking your son to the right day care!!! teach them early that trucks are cool hahaha