The Chunk

Photo by Guitar Ted Productions

So I was trying to explain to some people about the roads in Iowa and it only takes this image above to understand what Chunk is. The gravel is more like rocks. They love to bust up tires that are narrow and are run at low pressure. I suggest a minimum of 40mm to deal with this situation. A lot of times we would see a line on the side of the road where the grass is. 

Prepare accordingly. 

Ari