Why Should Brake System Bolts be Precisely Tightened?

In cars and motorcycles, the brake system is a critical component for life safety. Whether it's the brake caliper, brake disc, or brake fluid pump, they are all secured to the vehicle by bolts. Many people believe that "tightening them won't make them fall off," but in reality, brake system bolts must be tightened to a precise torque value. Overtightening or undertightening can pose serious safety hazards.

1. Risks of Overtightening Bolts

Excessive Metal Stress: Brake discs or calipers operate under high temperatures and pressures. Overtightening bolts can cause deformation or cracking.

Increased Repair Difficulty: Overtightened bolts can easily seize under high temperatures, making them difficult to remove during subsequent inspections and may even require cutting.

2. Dangers of Overtightened Bolts

Loose Brake Calipers: The brake caliper directly impacts the brake disc. If not securely secured, braking performance will be significantly reduced.

Safety Hazards: Loose brake bolts can cause brake failure at high speeds or during emergency braking, with disastrous consequences.

3. Manufacturer-Recommended Torque Standards

The repair manual for every car and motorcycle clearly indicates the torque range for brake-related bolts.

For example, the torque for brake caliper mounting bolts is typically between 25–35 Nm (on motorcycles), while it may be around 100 Nm on cars.

These values vary by model, but they are all repeatedly tested and verified by our engineers to ensure optimal tightening.

4. The Role of a Torque Wrench

Preventing Human Error: Avoiding uneven tightening caused by "feeling your hand."

Ensuring Safety: Ensuring that every bolt is within the standard torque range.

Extending Component Life: Preventing brake disc deformation or caliper wear due to improper force.

Conclusion

The brake system has no margin for error; the tightening accuracy of a single bolt can mean the difference between life and death.

👉 Remember: Brake system bolts must be precisely tightened with a torque wrench to ensure true safety.