Single Speed Riders
Stewart and his 2-speed Surly Cross-Check
Aaron's Colnago Fixed Gear Xtracycle
The cog on the downtube is for added DANGER!
Wynn Track Bike with Custom Bell Brake
Dean and his custom "3-speed" single/flip-flop Strong with White Industries and Phil drivetrain.
By far the smooooooothest drivetrain you will ever feel!
Jeff's custom drum brake, SRAM 7 Speed internal gear with 650A (590mm) wheels on a formerly 27" wheeled Fuji frameset.
Not actually a single, but it has the same simple chain.