In G scale many users add bearings to the trucks so that they can pull more cars. I was reading here about some users that have large passenger trains and add head end power to pull it up grades. I have my set of 4 GGD 21st century cars that I will upgrade to LED lights soon. While they're on the bench it occurred to me to look at how well they roll. I plan to get more cars in this train someday. I noticed that my Dreyfus Hudson doesn't have a ton of pulling power by itself. I thought I'd just add more engines to help.
Does anyone make axles with bearings or just bearings that can be inserted in the side-frames in O scale? Do you just add more engines?
