p.30
If you see the wear marks below on your tires, please change your tires.
In the event of excessive wear, you can order new tires via our
sitehttps://www.wispeed.net/assistance section or contact the after-sales
service to replace the tires.
7.4 Maintenance
7.4.1 Maintenance of the braking system:
Your drum brakes are adjusted at the factory, if you wish to change this setting,
contact a professional.