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1:45 scale
Swiss Furka Overalp Bahn (FO) class HG 3/4, 2-6-0T driving wheels.

910 mm (2′ 11¾″) diam., 11 oval spokes, rectangular inner rim, apparent tread 65 mm.
Hub 333 mm face dia., level with the tyre.

Source: works drawing.

Castings: 20.2 mm tread dia., 17.3 i/d, hub level with the tyre.

Casting prices and stock . Swiss loco sets, price list

Scans of a casting in a set for a Furka Overalp Bahn HG 3/4

Scan of casting C350

Cross section diagram of castings C350
This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For other standards remove more or less metal from the back of the wheel to give your chosen tyre width.

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2 June 2018