This is a very important issue. The answer is: it must be done!
During tire repair, the tire undergoes disassembly and reassembly, which alters the position of the balance point. Additionally, materials such as patches and sealants are used during This is a very important issue. The answer is: it must be done!
During tire repair, the tire undergoes disassembly and reassembly, which alters the position of the balance point. Additionally, materials such as patches and sealants are used during the repair, potentially changing the weight distribution of the tire. Therefore, it is advisable to perform a dynamic balance after the repair!the repair, potentially changing the weight distribution of the tire. Therefore, it is advisable to perform a dynamic balance after the repair!

Why is dynamic balancing necessary?

The purpose of dynamic balancing is to correct the uneven distribution of wheel mass.
1. Tires and wheels themselves are not perfect: their mass distribution cannot be completely uniform. There may be slight differences in manufacturing.
2. Tire repair disrupts the original balance: Even if the tire and wheel rim were originally balanced, the tire repair process (such as grinding, applying tire patches or rubber strips) is equivalent to adding new mass to a specific position of the tire, which will inevitably disrupt the previously established balance state.
3. The original balance block is removed: When removing tires, the lead block originally attached to the wheel rim for balance is usually removed. Even if you put it back in its original state, the original balance point no longer exists.

What are the consequences of not doing dynamic balancing?

If the wheels are unbalanced during dynamic rotation, a centrifugal force will be generated, causing the following problems:

• Steering wheel shaking: When driving at high speeds (usually at speeds of 80-100 kilometers per hour or above), you will feel a significant shaking of the steering wheel, which affects driving comfort and confidence in handling.
• Vehicle vibration: In severe cases, not only does the steering wheel shake, but the entire vehicle body also resonates and shakes.
• Exacerbation of suspension and steering system wear: Long term shaking and vibration will increase the wear of suspension components (such as shock absorbers, ball joints), steering system, and bearings, shorten their service life, and increase maintenance costs.
• Tire eccentric wear: Unbalanced wheels cannot smoothly ground, which can cause irregular wear of the tire (commonly known as "tire gnawing"), greatly shortening the tire life.

Not doing dynamic balancing not only makes it uncomfortable to shake, but it may also affect the lifespan of some suspension and components of the entire chassis.

Under what circumstances is dynamic balancing not necessary

• Inflate only without removing the tire: If you only inflate the tire and the tire is not removed from the wheel rim, then there is no need to perform dynamic balancing.
• If the tire has only undergone simple external repair (rubber strip repair) and the tire and wheel rim have not been removed, the dynamic balance is not affected and no additional operation is required.

Performing dynamic balancing after tire repair is a standard and necessary procedure. This is for the sake of your driving safety, driving comfort, and the long-term health of vehicle parts. The cost of tire repair usually includes dynamic balancing services, and it is reasonable for the shop to request additional fees. If the shop directly installs the tire without doing dynamic balancing after repairing it, it is unprofessional behavior, and you should proactively ask them to do it.

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