Introduction

This article is for:

  • everyday cycling (not racing, or down-hilling etc.)



 

WHAT YOU NEED TO KNOW

PRECONDITIONS: You have a safe place to test your brakes - are the new cables attached securely? and the brakes effective and responsive?

TIME: 30 minutes - 1 hour.

DIFFICULTY: There are quite a few steps.


STEPS

1. Remove cable

2. Fit cable

A GOOD HABIT

Check brake cables often

 



1. Remove cable

undo cable anchor bolt
To extract cable from the lever, undo the cable anchor bolt at the brake.
extract old cable
Pull out old cable until it hangs from the brake lever.
  • Extract cable from lever: Undo the cable anchor bolt at the brake and then pull the cable back through all the cable housing and guides until the cable just hangs from the brake lever. Squeeze the brake lever and push the cable – the cable should appear through its retaining hole in the brake lever.


Note the shape of the nipple at the end – bike cables come in different sizes, with differently-shaped ends (barrel, cyclinder etc) so make sure you buy the right replacement. Keep the old cable for reference.



2. Fit cable



lubricate cable
To prepare the new cable, lubricate it with oil direclty from the bottle.


  • Prepare cable: New cables often come with a different nipple on each end. Cut off the unwanted nipple, making sure that the cut is nice and neat - you can’t poke a frayed cable through little holes! Cut any new lengths of cable housing to size. Lubricate the cable by running oil down it, or putting some oil in your palm and then pulling the cable through your hand.

insert new cable
To insert the cable back in the anchor bolt, run it through all the housing and guides.


  • Re-run the cable: Push the cut end back through the brake lever, and then through all the housing and guides, until you finally insert the cable back through the anchor bolt. Get all the components along the brake line nicely seated and aligned, and then pull the cable hard.

crimp cable end
Pull brakes by squeezing the brake blocks, then tighten the bolt to secure cable.


  • Attach and adjust: With one hand, squeeze the brake blocks together against the rim and then relax them a millimeter or so. With the other hand, tighten the anchor bolt until the cable is secured. Loosen the cable adjusting screw until the wheel spins freely. It may take a few attempts to adjust the brakes perfectly



  • Test: Pull the brake lever hard to make sure the anchor bolt is secure. Give you new brakes a ride and test them somewhere safe. Finally, cut off unwanted cable, and crimp a cap over the end to prevent fraying.


Check brake cables often


Rusted cables can suddenly snap when you most need them, so check and replace them in good time.

The cable in the picture is corroding near a rusty boss - best replace it. Cables can rust inside kinked or split housing, so check there too

replace brake cable
Check brake cables frequently to avoid rusty cables snap.

Results


responsive image

Brakes feel responsive




Bike Fixer

photo of mc

Bike Fixer is a co-op of bikers and web designers.
"mc" grew up car-free in the countryside, and had to ride a bike from an early age - absolute magic! In later life, he survived London traffic and l'Etape du Tour.


Sources

The books below are tremendously helpful, but there is a lot of material to get through.


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