How to adjust the rear brake of a bicycle
The bicycle brake system is an important guarantee for riding safety, and the adjustment of the rear brake is particularly critical. This article will explain in detail how to adjust the rear brake of a bicycle, with relevant data reference.
1. Steps to adjust the rear brake
1.Check brake pad wear: The brake pad needs to be replaced when the thickness is less than 1mm.
2.Adjust brake line tightness: Change the braking force by adjusting the fine-tuning nut on the brake line.
3.Calibrate brake pad position: Make sure that the contact surface of the brake pad and the rim is parallel and does not rub against the tire.
4.Test braking effect: Test brake sensitivity in a safe environment.
| parts | Standard parameters | Check method |
|---|---|---|
| Brake pad thickness | ≥1mm | Visual inspection or measurement with calipers |
| Brake cable tension | 2-3mm free travel | Pinch the brake lever test |
| brake pad angle | Perfectly parallel to the rim | Visual adjustment |
2. Common problems and solutions
1.Abnormal brake noise: The brake pads may be dirty or the angle is wrong and need to be cleaned or readjusted.
2.Insufficient braking force: Check whether the brake line is too loose or the brake pad is severely worn.
3.Brake rebound slow: The brake line may be rusty or the spring tension may be insufficient.
| Problem phenomenon | Possible reasons | Solution |
|---|---|---|
| brake squeal | Dirty brake pads | Clean brake pads with alcohol |
| Braking stroke is too long | The brake line is too loose | Adjust the trimmer nut |
| unilateral brake | Brake pad angle is incorrect | Recalibrate brake pads |
3. Maintenance suggestions
1. Check the brake system regularly. It is recommended to conduct a comprehensive inspection every 3 months.
2. Clean the brake system promptly after riding on rainy days to prevent rust.
3. Use special bicycle lubricant to maintain brake lines.
4. When replacing brake pads, it is recommended to replace them in pairs to ensure balanced braking force.
4. Tool preparation
To adjust the rear brake, you need the following tools:
| Tool name | Purpose |
|---|---|
| 5mm Allen wrench | Adjust brake calipers |
| Phillips screwdriver | Fixed brake pads |
| Caliper | Measure brake pad thickness |
| Lubricating oil | Maintain brake lines |
Through the above steps and methods, you can easily adjust the rear brake system of your bicycle to ensure safe riding. If you encounter complex problems, it is recommended to seek help from a professional bicycle repairman.
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