Hi Paul.

Tractionator GPS, Adventure and Rall Z "TUBELESS" tyres in 90/90-21 and 150/70-18 size are the correct tyres for your bike. They are suitable for Tubeless wheels and can also be used with tubes. 

The construction of all these tyres is designed specifically to give 200+ kg Twin cyllinder Adventure Bikes, like the Africa Twin, the optimum performance, durability and resistance to damage in all conditions. 

These are tough tyres that give big smiles for thousands of miles