In the past I have built up our bikes with the cable all on the same side. Later I decided that with cable under the bar tape crossing in front of the head tube to the cable stop on the opposite side results in less stress on the cables. For example when turning the bars as if turning the bike left the cable on the left side seems to handle the turn better than with the cable on all on the same side. To get the cable back on the correct side I cross cable under the bottom tube. On singles I cross it under the down tube. The angle is very slight especially on tandems.
To a certain extend this depends on how you like the cable to look. Both methods worked well for me.
Last edited by waynesulak; 01-29-13 at 10:25 AM.