2.6" tyres that I know fit is the gaz (never my favourate as a 2.6 and the halo ception which is really nice. Would certainly be my choice. But it is a ok branded tyres, not sure what it’s real name is.
i have a 3 inch gazz in my 24inch nimbus 2 frame and it fits fine,
my’n has been trough a realy lot of stress and it still hasnt devolept any rub at all.
i know at least one other person who has the same set up and it works fine for him also.