Dinka's Double-T sport bike has been around since GTA IV, loosely modeled on Honda's CBR line throughout. Trailer 1 confirms it made the trip to GTA 6. At a datamined 200 kg with five gears, it should be quick, twitchy and unforgiving, which is the entire point of a supersport. Bring a helmet, not that helmets have ever counted for much in this series.
Rockstar has not explained how you get a Double-T. Sport bikes have traditionally been both street spawns and shop purchases in the series, so either path would be in character. Unconfirmed until launch.
It was confirmed through the first GTA 6 trailer.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.