5′ 6″ diam., 18 rectangular spokes, rectangular inner rim.
Hub 14″ face dia., 1″ out from the tyre.

Source: GER Locomotives in Locomotive Magazine, figs. 76, 82. Some dimensions estimated.

Casting: 52.4 mm tread dia., 47.6 i/d, hub 0.8 mm out from the tyre.

Scans of a casting in a set for an ECR/GER 2-2-2 Sharp Single.