Why not just leave your bike upside down for a few minutes, allowing oil to seep down to those foam rings? Why the need to slide the lowers (almost) off? Loris suggests this at 0:35 and (with a twist) at 5:52: https://youtu.be/ydDguzJkj7k
after two weeks of running them. No flats yet. i am riding mostly surrey hills though so not very rough. I do have two weeks in scotland now though so will be a good test for them. one disadvantage so far would be weight. I have gone for light weight tubes on their advise but it is defiantly heavier. Weight...