This article refers to bicycles with straight handlebars.
Steps
Step 1. Check the cable
It should be changed if it is frayed or if it has become dry. When you see one of these signs, it means that the metal core has been damaged. Any friction generated on the cable can block the brakes and put your safety at risk. Check if there is any damage to the outer sheath or if the metal cables have folds. You have to change both the sheath and the metal core, if the former is broken.
Step 2. Buy the right cable
It is important to have the right cable for your bike. Check that the final fitting matches that of the original cable. These can differ according to the type of handlebar (straight or curved).
Step 3. Loosen the bolt
Locate the nut securing the cable. You will need an Allen key for this job; be careful not to lose the piece of rubber slipping out of the cable or metal terminal - you'll have to put it back in place later.
Step 4. Unscrew the regulator
It sits next to the brake lever on the handlebar, and looks like a small hollow barrel through which the wire passes. Use your fingers for this.
Step 5. Remove the cable
Line up the two grooves where the cable enters the brake lever. This way the cable should come out very easily.
Step 6. Replace the outer sheath
Keep the two cables close to each other to know the right length.
- Use wire cutters to make a neat cut. Check that there is a smooth hole to allow the metal core to slide freely. Then fix the metal tip.
- Slide the cable inside the hole. Check that it passes through smoothly. Insert all the metal core into the sheath.
Step 7. Reattach the final fitting
Hook the connector to the brake lever by making the two grooves coincide and without forgetting to pass the cable through the barrel adjuster. At the other end, slip the cable into the special supports and push through the sheath. Insert the piece of rubber (which you had previously set aside) from the wider end: this prevents dirt from entering the cable. Thread the cable under the nut.
Tighten the nut tentatively with an Allen key. Reattach it to the brake by pulling the lever and inserting it into the hole. Make sure everything is properly secured and locked into place
Step 8. Secure it
Loosen the Allen nut and slide the cable through it. Finally, tighten the nut.
Step 9. Do some checks
- Pull the lever firmly several times to pull the new cable. Change the voltage if necessary.
- Check that the outer sheath is well positioned inside the barrel regulator.
- Check that, at the other end, the cable is well seated.
- Pull the brake lever several times. If you feel a little soft, you need to stretch the cable a little more. When you're done, check the tightness of the nuts.
Step 10. Trim the excess cable
This is the right time to do it.
- Leave about 7-8 cm of brake clearance.
- Attach the end cap to prevent the metal core from fraying. Crush it with pliers or wire cutters.
- Secure it around the brake.
Step 11. Do the final checks
Make sure the brakes work well before riding the bike.
