Just before I began my latest self-supported tour from Pittsburgh to Washington DC, I decided it was time to replace the Schwalbe Marathon Plus tires on my Surly Long Haul Trucker. After 5000 miles, the tires still had maybe 20% of the tread remaining. However, I did not want to take any chances with tire failure during my tour.
This is my fourth set of Marathon Plus tires and I got about 5000 miles from each pair. I have used tubes from both REI and Adventure Cycling Association and both have served their purpose. When I replace tires I always use new tubes. To me the chances of a flat due to deteriorating rubber are worse than the chance of a puncture. Between the tires and the tubes, I can’t remember the last time I got a flat tire.
This is another strong recommendation in favor of Schwalbe Marathon Plus bicycle tires from nearly 15,000 miles of use.