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@Flandria
Hi all,
Today I replaced cables on a friends bike with R8000 Ultegra disc. While installing the new cable, the shifter started to block. The lever blocked so it was impossible to move it inward (shifting to lighter gear). Even without the cable in the shifter, this problem occurred. I couldn't really find the origin of this problem, but it got solved after applying silicone spray (quite a lot) on the internals. So problem solved, but it buggers me that I don't know the reason of this failure. Some months ago, I had exactly the same problem on the left hand shifter. Also solved by copious amount of pfte spray. And I had the same problem on a bike with R7000 105. Is this a known problem, of did I missed something? What would cause this 'blocking' of the paddle?
Both bikes are less than two years old. More or less 8000k on every bike.