I suspect the tyres are not the originals, from what I can discern from photos of unmolested locos they were a fair bit narrower, certainly more in keeping with a 2ft gauge machine.Tyres are from Krupp (Germany I guess - they had no plants in the USA) in 1912.
When were these WW1 era locos built I wonder? America only got involved in the Great War in 1917 so guess they used old stock tyres?
Krupp were transporting iron products worldwide (plenty supplied to the fledgling American railroads), for example to Argentina, in their own ships, and taking return loads of Argentinian grain back home.