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Bowden cables routed correctly

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 · 30.06.2006

Bowden cables routed correctlyPhoto: Daniel Simon
Friction in the cable system of the racer torpedoes the controllability of the brakes and the shifting precision. However, Bowden cables cannot work completely friction-free and precisely due to their design. They are susceptible to dirt, the inner cable stretches under load and the outer sheath is compressed.

Friction in the cable system of the racer torpedoes the controllability of the brakes and the shifting precision. However, Bowden cables cannot work completely friction-free and precisely due to their design. They are susceptible to dirt, the inner cable stretches under load and the outer sheath is compressed. This makes them anything but ideal for controlling the sensitive ten-speed gearboxes of modern racers - but as long as hydraulic and electric systems are still in their infancy, you have to come to terms with the wiry classics, i.e. install them properly and maintain them regularly. Here we show you how to route the brake cables - the shift cables only differ in a few additional details. Prerequisite for this work: You should be able to adjust the gears and brakes and wind the handlebar tape.

Degree of difficulty: for experienced screwdrivers

You will need:

  • Tool: 5 mm hexagon socket, cable and side cutter, file, needle
  • Excipients: Grease, insulating tape

GOOD TO KNOW

Info 1: Shifter cables and brake cables are not interchangeable - they differ in the diameter of the inner cable, head shape and outer sheath. Info 2: The length of the outer cable housing must be adjusted. The short section of the outer housing that leads from the chain stay to the rear derailleur is not changed. Info 3: Campagnolo runs the cable along the handlebars, the bends cause increased friction. With small frame heights, there is little space to route the cables without kinks - cross the cables: The front derailleur cable runs to the right side of the down tube, the rear derailleur cable to the left. Then cross the cables again below the down tube.
1. fold the rubber grip of the brake lever forwards and insert the outer brake cable housing into the top of the brake lever from the handlebar side until it touches the inside. Check this by looking through the inspection cut-out in the grip. Place the sleeve in the groove along the handlebars up to the thickened area next to the centre of the handlebars. This is where the handlebar tape ends later and the cable emerges into the open.


RELOCATE BRAKE CABLE

1. plastic rails, which are now fitted as standard by most frame builders, help to prevent friction on the bottom bracket shell. They are also supplied with the shifters. Important: Shimano applies grease to the cable housing as standard - from the side with the lettering. So only shorten the housing at the other end! Hold the labelled cable housing end to the exit in the grip and turn the handlebars to determine the required length up to the stops on the frame. The shift cable must not be kinked in the process.

Excursus: SHIFT TRAINS

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