Truck is an American expression and as far as I am concerned suspicious
To only be used in the company of those strange people who model the American scene … one of my best freinds does this.
‘Truck’ is a road vehicle.
If I were French I would call that locomotive a 231 Pacific, as a memorable short film made in the ’50s with music by Honieger [that’s my phonetic spelling sorry
] which featured such a loco..
Actually the ‘correct’ word to describe the leading and trailing wheels of a 4-6-2/231 is a ‘bogie’ as also similar items under modern wagons and carraiges.
I model scale railway as well as boats
The craft in question is shortly to make her maiden voyage, perhaps even today .. will report on her if she doesn’t sink. Her guns have four fixed round things similar to early railway wagons [ apart from the lack of flanges] so I will be safe and call them wheels
As castings they are fixed both in place and ability to rotate.