4′ 6″ diam., 14 oval spokes, vee inner rim, 4¾″ apparent tread, 5½″ tyre width.
Hub 13″ face dia., ½″ out from the tyre. Outside cranks.

Source: No 08.772, D3940 measured direct at Chappel in March 1995.

Casting: 42.9 mm. tread dia., 35.2 i/d., hub 0.4 mm out from the tyre.
Tyre width for exact scale modellers: 5½″ at 1:32 = 4.4 mm.

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