Green’s Dictionary of Slang

(US) one who is mean or impoverished.

1922		Washington Times (DC) 12 Nov. n.p.: He turns out to be a bank clerk all right [and] he’s the world’s champ flat-wheeler.
1922		Appleton Post-Crescent (WI) 3 May 7/4: Flapper Dictionary flat wheeler – A young man whose idea of entertaining a girl is to take her out for an Ankle Excursion.
1922		Davenport Democrat and Leader (IA) 28 May 32/2–3: We bloused into a nosebaggery with a flat-wheeler and boiler-factory.