My 2010 1200GSA had to replace rear pads at 12000. Has done 2 Dolomite trips, one of those 2 up. I thought it was fair use given how much more I use rear brake 2 up. Strangely fronts only 20% worn. Never mind its only money.
They eat front and back tyres at an identical rate, wearing both boots out at a little over 5,000 miles. That's with minimal motorway use, mostly N and D road hooning in France.
I am on my third set of Metzlers at 12000 miles, last changed at 11,000. So, I'll be expecting to change again at 16,000. Shame they won't do six a pop, to at least line up with the service interval.
I may well go sintered front and back next time around.