What types of trucks do various modern types freight cars use? i.e modern bocar, gondola, tank car, covered hopper, caboosh, flatcars, etc. Do they use Bettendorf trucks, A.S.F. Ride Control 50-Ton etc.
All modern interchange freight cars have to have roller bearing trucks. These usually are 70/100/125 ton versions depending on the loading requirements. There have been several manufacturers over the years.
Here is a good link to the history of US freight trucks:
http://www.trains.com/mrr/objects/pdf/mr_pi_5-06_freightcartrucks.pdf
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin