Resurrecting this thread as I’ve run into problems myself and I thought it’d be a good idea to keep the knowledge in one thread.
So I’ve built the bike with a new XT shifter, rear mech and 11-42 cassette – plus a new superstar 32t narrow/wide ring on an SLX double chainset.
Using a new 11 speed 105 chain, which I thought should be fine as the XT chain is listed as XT/Ultegra anyway.
Worked OK on the stand apart from when backpedaling on the two largest sprockets the chain climbed back down the block. It did this regardless of B-tension screw position.
Bike has a pressfit BB so no option to adjust chainline with BB spacers. Thought I’d left chain long enough, with mech at about 5 o’clock when chain on biggest sprocket.
Decided to see how it worked on the road and all seemed well until after a minute or so the chain jammed when I dropped it into the smallest cog and built up a bit of speed. On closer examination there are now a couple of mangled links and I have the right hump.
Any ideas what I’ve done wrong? I don’t wanna sacrifice another chain to the angry god of Shimano.