How To Set Up Cable Disc Brakes On A Bike| Bicycle Maintenance Basics, by GCN Tech on YouTube. 7 min 40 s.
- Video length
- 7 min 40 s
- Time to do it
- 30 minutes
- Difficulty
- Medium
- Steps
- 8
What you need
Steps
Fit the rotor to the hub with the Torx bolts and tighten them evenly in a star pattern. Make sure the rotor spins true and does not rub.
Bolt the caliper to the frame or fork mounts loosely so it can still slide side to side. Do not fully tighten the bolts yet.
Squeeze the brake lever firmly to centre the caliper over the rotor, then tighten the mounting bolts while holding the lever. This sets the pad alignment.
Run the cable through the lever, then through the housing to the caliper. Pull it snug and clamp it at the caliper arm.
Turn the barrel adjuster at the lever or caliper to set pad clearance. Aim for a small, even gap on both sides of the rotor.
Spin the wheel and check for rubbing. If a pad drags, loosen the caliper bolts, recentre and tighten again.
Squeeze the lever hard several times to bed the cable and pads in. Recheck tension and take up any slack with the barrel adjuster.
Test the brake at walking speed before riding properly. Both pads should contact the rotor evenly and the lever should feel firm.
Tips and common mistakes
Keep grease and oil off the rotor and pads, as contamination kills stopping power.
If the lever feels spongy, the cable is stretched or the housing is kinked.
Tighten rotor bolts evenly so the disc stays flat and does not warp.
Check pad wear regularly and replace pads before the backing plate touches the rotor.
Questions
Why does my disc brake rub after setup?
The caliper is probably not centred or the rotor is slightly bent. Loosen the mounting bolts, recentre with the lever held and tighten again.
How much pad clearance should I leave?
Just enough that the rotor spins freely without touching. Too much gap makes the lever feel long and weak.
Can I use this guide for hydraulic brakes?
No. Hydraulic systems need bleeding and different tools. This guide covers cable operated brakes only.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
