There are two different types of Continental Motorcycle and Scooter Tyres available: Tube-Type Tyres and Tubeless-Tyres.
These tyres are designed to be mounted on tubeless rims (see rim description below) and have a corresponding TL marking in the description of the tyre size (e.g. 120/70 ZR 17 M/C 58W TL).
Continental Tubeless-Tyres can be mounted on tubeless rims without inner tubes but also on tube-type rims, if mounted with inner tubes of the correct size.
TT tyres are designed to be mounted on tube-type rims only (see rim description below) and have a corresponding TT marking in the description of the tyre size (e.g. 90/90-21 M/C 54S TT).
Tube-Type Tyres from Continental have to be mounted on tube-type rims with inner tubes of the correct size but are not allowed to be mounted on tubeless rims, neither with tubes nor without tubes.
Tubeless rim
Tube-type rim