Does the subject want to ask "how about Shimano's 4700-lap braking"? Pity.

1. Insufficient braking force: Shimano braked for 4,700 laps, and the braking force was insufficient for 4,700 laps with noise.

2, poor brake elasticity: Shimano 4700 brakes, the brake handle is very thin, the elasticity is still very large, resulting in weak brakes.