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On a another forum a chap has a bent middle ring on a Shimano chainset ,but there is no answer why? My midle chain ring is also bent/buckled,has it been caused by a rock?or is it just a weak part that needs upgrading ?i can't figure out how its bent as the the other two are ok ?
Prob chainsuck or a shifting **** up.
You can straighten them.
Absolutely sure it's bent? Shifting ramps and profiles can make chainrings look pretty wonky.
Check the chainring bolts are nice and tight as well.
Wow. My first double post...
Ah Chainsuck!It all makes sense now,the bit where the chainstay meets the BB is a bit mangled from the chain getting in there ,it happens a lot on up shifts?what causes it?is it my clumsy shifting?or is it just a fact of life ,also is it the bent middle ring that is making it happen every ride?one last thing ,I guess its not doing my frame any good? am i right !