Larry,
You might want to re-think using the small diameter wheels on the "standard" bachmann freight trucks and passenger car trucks.
The littlle, undersized freight cars, listed by Bachmann as being 1:20.3 are really small. Their trucks are small and as such the smaller diameter wheels work due to truck size.
The small 24.5 mm wheels are used on the 95xxx series cars as listed above. They are also used on Bachmann side dump and V-dump cars, 92xxx series.
For all other Bachmann 1:22.5 equipment, both freight and passenger, the larger 31.0 mm diameter wheels are used. I think you'll find better tracking with less derailment problems using the larger diameter wheels.
JD
You might want to re-think using the small diameter wheels on the "standard" bachmann freight trucks and passenger car trucks.
The littlle, undersized freight cars, listed by Bachmann as being 1:20.3 are really small. Their trucks are small and as such the smaller diameter wheels work due to truck size.
The small 24.5 mm wheels are used on the 95xxx series cars as listed above. They are also used on Bachmann side dump and V-dump cars, 92xxx series.
For all other Bachmann 1:22.5 equipment, both freight and passenger, the larger 31.0 mm diameter wheels are used. I think you'll find better tracking with less derailment problems using the larger diameter wheels.
JD