Touring Tires

I got about 10,000 out of my Avon I have a Perrelli on the back now seems a little bit hard compared to avon hopefully I can get at least 8000 out of these .
 
Not supposed to mix radial and bias-ply that way, but I've never heard of anyone getting off on account of it!
1olbull do you know why manufacturers are now doing exactly this, the new Indian challenger runs radial rear bias front, new metzler cruisetec tires? I’m looking to change tires and finding a v rated 140 or 130 in 16in with a load rating above 67 is difficult, is 67 ok for front of touring?