In one word. PR3. Actually Michelin PR2 , Pr3, pr4 have been highly favoured across big brand bikes
Truly a sticky wet tyre and tour friendly , i did 18k on them. I have also tried BT23 which are quite good actually.
My fav BT tyre is the BT92 which i am running. Its a very sticky tyre , almost as good as PR3. Cant complain! 🙂
So PR3, PR4, BT92, T31(bridgestone) are my picks and ideal for such bike
The stocks weigh a ton & are made of bricks!!! Quite suicidal in winter ill tell you that!lol