IBLS Wheel Standards
SWLS Suggested Wheel Dimensions
It’s not MY track. It’s YOUR equipment!
From the “IBLS Wheel Standards” published in the October 1981 issue of Live Steam magazine.
| Key | TG (Track Gauge) |
T (Tire Width) |
W (Flange Width) |
F (Flange Depth) |
R (Fillet Radius) |
B (Back to Back) |
G (Wheel Gauge) |
WC (Wheel Check) |
H* (Coupler Height) |
| Prototype | 56.500 | 5.500 | 1.156 | 1.125 | 0.688 | 53.380 | N/A | 54.530 | |
| 1:12 Scaled Prototype | 4.708 | 0.458 | 0.096 | 0.094 | 0.057 | 4.448 | 4.544 | ||
| 1 Inch Scale Standard | 4.750 MIN. |
0.506 MIN. |
0.125 MAX. |
0.140 MAX |
0.062 +/-.010 |
4.437 +.020/-0 |
4.690 +0/-.020 |
4.562 REF. |
2.875 |
| 1:8 Scaled Prototype | 7.062 | 0.688 | 0.144 | 0.141 | 0.086 | 6.672 | 6.816 | ||
| 1½ Inch Scale Standard for 7½ Inch Gauge | 7.500 MIN. |
0.750 MIN. |
0.156 MAX. |
0.187 MAX. |
0.094 +/-.015 |
7.120 +.020/-0 |
7.440 +0/-.020 |
7.281 REF. |
4.4375 |
H* – Top of Rail to Center-Line of Coupler.
All Dimensions are in Inches.
Standards for other scales can be found several places. Try these: