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I am building up a bike with M8000 groupset. The chainlink between the dinner plate and chainring is fairly extreme, noisy and looks like it will eat the chain. Is that normal. The frame is boost with 73mm BB. I guess I can take the spacer from the drive side of the BB. Any other suggestions?
Pretty normal i'm afraid. Some of them are so bad that it sounds like the chain is rubbing on the (non-existant )front mech. Chainline used to be the holy grail at one time, but marketing has decide it's no longer of any importance. I'm happier sticking with my 3x9/3x8 for as long as i can get parts.
Assuming you have chainring/chainstay clearance you can space the ring in. Ideally leave the BB spacers as they are and use chainring spacers to move the ring inboard by around 2-3mm - makes a massive difference.
https://www.sjscycles.co.uk/chainsets/12-wheels-manufacturing-chainring-spacer-each/
I've moved the BB spacer to the left hand side on mine. It's helped, but not eliminated the noise.
On mine, I think the noise is the angle the chain comes into the chainring, and it's much worse in sticky or gritty mud. I've wondered if it is significantly worse on a narrow wide ring, and guess some rings are worse than others due to the shape of the teeth and also how well it clears mud.
I seem to remember reading a review of a funkily shaped chainring on Pinkbike I think, and it aid that it was really sensitive to chainline in the noise it made. So it's possible.
Not directly relating to the situation, but on my fixed gear, new chains are always a bit noisy. The transmission goes quiet after I guess the chain 'beds in' on the wear of the sprockets.