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> IBLS Wheel and Coupler Standards
IBLS Wheel and Coupler Standards
Note: Some of the data may have changed since
published
Coupler height from center of coupler to the top
of the rail: 4.38"
These "Interim IBLS Standards" have been widely
adopted and have become the accepted wheel standards for the hobby.
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Track Gauge Minimum |
T Tire Width Minimum |
W Flange Width Maximum |
F Flange Depth Maximum |
R Contour Radius |
B Back to Back |
G Wheel Gauge |
Wheel Check Reference |
| 1½" to 1 foot |
IBLS 7¼" |
7.25" |
0.750" |
0.156" |
0.187" |
0.094"
+/-.015 |
6.870"
+.020
-.000 |
7.190"
+.000
-.020 |
7.031" |
| 1½" to 1 foot |
IBLS 7½" |
7.50" see note 1 |
0.750" |
0.156" |
0.187" |
0.094"
+/-.015 |
7.120"
+.020
-.000 |
7.440"
+.000
-.020 |
7.281" |
Note 1: Most tracks are being built to 7.5625"
to 7.625 gauge to reduce rail head wear.
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