Zerogee
Clencher's Bogleman
Further to the original question, I notice that Bachmann make two sizes, the smaller one (24.5mm) being for 4-axle bogie stock and the larger (31mm) for the two-axle stock. But the odd thing is that LGB, despite using the smaller wheel diameter on their own bogie stock, do not seem to have an equivalent small wheel set available as an accessory? The only sub-31mm wheels I can find in LGB listings are the tiny (20mm) ones for the Field railway stock. Am I missing something, or does LGB not make metal wheels to fit their 4-axle cars?