@D500 posted:Ahem...it's a "truck", not a "bogie".
"Bogie" is the proper term.
https://en.wikipedia.org/wiki/Bogie
https://www.tasrail.com.au/glossary-of-train-speak
http://www.railway-technical.com/glossary/
But yes, the bogie is commonly referred to as a 'truck' in AAR terminology.