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Is it too worn out and needs 100000% replacement or did I fall for the advice of bike fags who would replace something after a fairy farts towards it?
I've measured with a caliper ~117mm on 9 links which means the chain is at least 2.36% larger than new.
Bike "gurus" on youtube say to replace it once it reaches 0.75% enlargement (it might wear out other parts otherwise)
Do I have to replace my chainring too or just the chain?
Can I use a JIS bottom bracket with an ISO crankset (or the other way around) against bike nerd advice?
Please answer only if you're a normal human being and never wore a cycling kit. Thanks.