Disc diesel wheels

The following is a list showing the prototype feet and inch size with the metric equivalent size to the nearest millimetre in square brackets.

The sizes indicated in red are the equivalent prototype sizes if the wheel is used on a model with a scale of 3.5mm : 1ft. (HO) Please note that the sizes in red are an approximation only.

2' 9"    [838mm]      Disc diesel.
3' 2"    [965mm]

3' 0"    [914mm]      Disc diesel.
3' 5"    [1041mm] 

3' 31/2" [1003mm]     Disc diesel 'Warship'.
3' 9"    [1143mm]

3' 7"    [1092mm]     Disc diesel.
4' 1"    [1245mm]

3' 7"    [1092mm]     Disc diesel 'Western'.
4' 1"    [1245mm]

3' 9"    [1143mm]     Disc diesel.
4' 3"    [1295mm]

3' 9"    [1143mm]     Disc diesel 'class 24/25'.
4' 3"    [1295mm]

4' 0"    [1219mm]     Disc diesel.
4' 7"    [1397mm]