Machine Politics vs L'Équipe, August 2010. Photo by Steph Simcox
26" wheels. Rear wheel has a 110 spacing.
Just built up a 48h Salsa gordo rim laced to a BMX cassette hub.
Also had to file down and slot the freakin BMX-sized axle to fit in the drop outs.
Threw on 14t, 18t, and 21t cogs, and the drops outs are long enough to handle all three.