I have suceesfully fitted a Bottom half of a giro cable, upside down, to enable a twin pull brake to be used without a Giro.
#1 You need to cut off the nipples, on the "twin ends", remove the outer cable.
#2 You will need one of these levers, as they have a cable "grip" built in to lever itself;
#3 You will also need 2 of these nipples, normally supplied with a twin pull brake;
#4 offer up the cable to the frame, to establish where it is going sit, in relation to the cable "anchors", then cut 2 cable outers of equal length, then fit to the "twin" cables.
#5 fit the cable to the lever (do not tighten yet) and to the brake calipers (release the tension from the return sprins 1st)
#6 pull the cables tight towards the calipers, ensure all outers are seated correctly, then secure the nipples, but try to leave a few mm spare to allow the calipers to return to rest position when the brake is released.
#7 apply a little adjustment to the return springs to take up the cable slack.
#8 Screw the adjuster on the lever the midway position, then secure the cable (do not cut off the spare cable yet)
#9 Check brake operation, making any required adjustments (you may want to apply more or less spring pressure at this stage)
#10 When you are happy, snip off any excess cable and secure the cable "splitter" to the frame.
Hope I have not confused peeps too much, but this is long deliberated problem on my part, so I am happy with the result.
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