1981 IBLS Wheel Standard

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From the "IBLS Wheel Standards" published in the October 1981 issue of Live Steam Magazine. This version of the chart is somewhat difficult to read. It included rows of numbers that attempted to justify the values selected by the IBLS.

Drawing courtesy of Bill Donovan of RealTrains.com
IBLS Wheel Standard Measurements Chart.png

IBLS Wheel Standard Flange Detail.jpg
IBLS Wheel Standard Flange Measurements.jpg