Imbalance is the biggest issue for tires. At 50km/h, tire assemble will be out of balance by the centrifugal force created by imbalance.
When imbalance is 250g, and riding with 80km/h, it’s like a 36kg hammer hitting on the tire once every roll.
The uneven quality distribution on wheels and tires causes different centrifugal forces while rolling, which will impact the stability and form vibration and jumping.
Besides the riding comport impacted by the imbalance, it will increase the unnormal wearing on tire and suspension system. Increase the difficulty on riding controlling and threaten the riding safety.