Jackson Sharp Metal Wheel Size

[RkyGriz]

Hi everybody. I was wondering what the standard metal wheel size on Bachmann Jackson Sharp passenger cars is and how to measure them. Is it from the top of the flange to the bottom or is it from the top to the bottom of the actual wheel? I'm trying to upgrade some of my other non-Bachmann passenger cars to metal wheels and the standard Bachmann wheels are too tall for the application as these cars are lighted via track skates and the skates no longer make contact with the track when the standard Bachmann wheels are installed on the trucks.
Thanks guys!

[on30gn15]

Railroad model wheel sizes are generally stated by diameter of tread only, not including the flange.
If both measurements are given they will often be stated as diameter of tread, and diameter of flange.
Most often I've seen wheel sizes given as diameter over wheel tread, then with flange being such and such a depth/height.

These are the wheels those passenger cars use "31.0 mm all-metal wheels for kitbashing or repairs." http://shop.bachmanntrains.com/index.php?main_page=product_info&cPath=255_459&products_id=2985

There are also these 32.5mm diameter wheels which I currently understand to be used on the spectrum series 1/20.3 scale freight cars, not the JS passenger cars, http://shop.bachmanntrains.com/index.php?main_page=product_info&cPath=255_459&products_id=5356