this post was submitted on 17 May 2024
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Thanks for the info.
Yeah, the LBS said the middle chainring has some wear, so I'd rather just change it all up.
I'm staying with a 3x, and same gear range. Looking at a few Shimano front derailleurs, the BB will be quite a bit wider than what I have.
Maybe I can pretty-please my LBS to have a look and decide what the best swap would be. I'm also going by what they have in-stock or can get easily, so my options are further limited.
In that case I guess I would just order 3 new chainrings with the same number of teeth, keep the cranks and bottom bracket, just make sure to order the right number of bolts and BCD. Simple. There's a special tool to help hold the chainring bolt in place while you unscrew it but you can make do with a flathead screwdriver or an old spoke
Edit: and the front derailleur should also be fine unless it's damaged