I found that the Tourance EXP wears very quickly. I had the first year EXPs and only got about 5000mi out of the back one. I replaced it with an Anakee 2 and have about 50% left at 5000mi. I have heard that later EXP's have a deeper tread to give longer life.
2005 GS1150 Adventure - Range Rover, 2002 DR650 SE - Land Rover
"Not all who wander are lost" - JRR Tolkien