Today's Readers' Rig is a totally custom rear suspension Calfee MantaFly 101 owned by PEZ fan Andrew. Individual colors, Durace Di2, a selection of nice wheels to choose from and plenty of custom touches means Andrew and his Calfee get plenty of attention on his home roads of Colorado.

Chuck Peña got his hands on some Absolute Black Oval rings to give them a good going over, inspired by Chris Froome's wins at the Tour and Vuelta using oval chainrings. But with mixed views on their functionality, we asked what are they like to ride? Here are his findings.