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  • Not enough clearance at the drive side chainstay for the spider of the SRAM Omnium cranks to clear

    That's quite common, the Omnomnoms combine a narrow (track) chainline with a fat spider. Some people dimple the stay, some switch to a more svelte crank.

  • SRAM you bastards. I've had the same cranks for probably 10 years and never had this problem before. Being 10 years old, they're battered and probably not worth a huge amount (and I quite like them) so would prefer not to sell and replace them. How likely am I to die in a fiery blaze of glory/hubris if I try and dimple the chainstays myself?

  • had the same cranks for probably 10 years and never had this problem before

    They definitely fit some frames, but you're far from the first to find a frame they don't fit. If the cranks don't owe you anything and the chainring bolts clear the stay, I'd probably file the cranks rather than putting a spider clearance dimple opposite that already huge tyre clearance dimple

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