Schwalbe thunder burt addix mtb tyre liteskinthe schwalbe thunder burt addix mtb tyre is the fastest rolling tyre made by schwalbe that is intended for off road riding offering extremely low rolling resistance and being very light low profile fast rolling gripthe tread pattern comprises of a central section with a higher than normal amount of flat small central studs providing low profile fast rolling grip the outer studs have a wide profile to aid grip when cornering but will not have