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Discussion Starter · #1 ·
Posted this on the Component site, but have gotten no response, so here goes -

I have a Cannondale R700 Triple (I liked the color) and the big chainring is getting much sharper than the others, as I generally use that cog almost exclusively. My questions are:

How long does a chainring last?

Do I have to replace the ring with the same brand (It has a Truvativ crank) or are they standard sized?

And, last, if I changed the crank to, say, a Dura Ace, would I also have to replace the bottom bracket?

Thanks,
 

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Chainring wear varies with the quality of the chainring, and how worn you let your chains get before replacing them. Worn chains wear out chainrings faster. If the teeth look hooked the chainring is worn. You don't need to replace the crank. Chainrings are usually standard sized but often come with funny shaped teeth, shifting ramps, etc. Those generally shift better with other rings of the same make.
 
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