Out-of-roundness will cause the wheels to jump periodically, commonly known as jitter. Especially when maintaining a certain speed at high speed, it will cause car body vibration. The vibration point will be different according to the wheel size. Generally, it appears near 60km/h and120 km/h.

Adjustment method:

1, spoke wheel can be adjusted.

2. The aluminum alloy spoke plate can be slightly corrected, and can be replaced in severe cases.

If you need to adjust, you'd better find an old master who repairs bicycles, and it may be corrected.