Some examples of trucks available
The trucks are compensated, and the springs are dummies. The outer detail is cast urethane that is screwed onto the high denity polyethylene inner side frame which acts as both strengthener and bearing. The stretcher is aluminum channel. For custom orders, I can adjust the overall height of the stretcher, and also the size of the hole for the pivot to your specifications.

Type SP-43 Triple Bolster Truck (SP Daylight Cars)

Type 41 Double Drop Equalizer Bar Truck

Type 43R Triple Bolster Truck (NYC 20th Century Cars)

Wagon-Lits bogie

Wagon-Lits bogie with roller bearings

SR Bulleid coach bogie

LMS welded bogie

LMS 6 wheel bogie (compensated)

GWR 9ft bogie

French Y2 bogie

BR BR1 bogie

BR Commonwealth bogie