Strobist info = three flashes (Canon 540ez, Canon 430ex and Nikon sb28) triggered by Yong Nuo triggers. Rim light to camera left, behind rider, main light to camera right against the wall, fill high above camera on a lightstand, slightly to camera right. Shot at 640iso, 1/60, f5.6 (i think, feel free to check the data), flashes at approx 1/8 for the rim, 1/16 for fill, 1/8 for the front, but as I can't remember which flash I had where, that's pretty useless info.
There's a kinda set-up shot below for those who are interested.
This shot is from a hill-climb cycling event in London. Riders set off at 1 minute intervals so I set my flashes up and shot most of the riders as they came up the hill. Please check the rest of this set for more photos with the same set up