- The rubber is poor.
- The cable inserted into the rubber is a single wire rigid iron (rusty), as it is rigid cable transmits all the vibrations to the body, vibrations that generate a hum of friction on the asphalt.
Moreover as this cable is rigid:
- The tape once twisted after certain maneuvers remains twisted and no longer touches the ground.
- The band constantly rubs on the ground which generates noise and accelerates its wear