This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
	For Scale7 remove more metal from the back of the wheel to give a tyre thickness of 3.2 mm instead of 3.5 mm.	
	
 
			
		3′ 2″ diam.,  10 oval spokes, apparent tread 4¾″, tyre thickness 5⅜″.  
		Hub, 12½″ face dia., ¾″ out from the tyre.
			
		Sources: No 4472 measured direct at Llangollen in Feb. 1995.
		O.S. Noch, British Locomotives of the 20th Century, vol 1: page 218. Detailed works drawing.
Casting: 22.2 mm tread dia., 16.5 mm i/d., hub 0.4 mm out from the tyre.
Casting prices and stock . LNER loco sets, price list
Scan of a casting in sets for LNER Thompson A2/1, 6 wheel tender . Thompson A2/1, 8 wheel tender . P2 . V2 . Thompson/Peppercorn K1
	
	27 Mar 2013