Derek Malena, from the Allen Texas Police Department shows us the proper way to measure the rolling radius of a CMV Tire. You will likely need to know this to do a post-crash investigation. Give him a listen in this edition of Inspection Bitz.

Tom Mrozinski from the City of Frisco, Texas has a couple of pointers for inspecting air brake slack adjusters. They're easy to look at when the truck is tipped over. Plus, it only takes about a minute in this edition of Inspection Bitz.