After chopping the rear brake bosses off the Big Dummy, I installed a QR Rohloff disc hub laced to a 24" Large Marge. A Nokian Gazzaloddi 24 x 3.0 tire provides the traction and squish at the rear. I decided to go this route for two reasons: I wanted a large-footprint, high-volume rear tire to complement the Endomorph on the front. A 26" Large Marge would fit, but the Dummy doesn't accommodate a tire larger than 2.5" on a 26" rim. So I opted for the 24" hoop. The wheel outside diameter, with the big Nokian in place, is about…