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  1. I have a similar crank on a BMX bike I wanna work on and was wondering the same thing does it take a different style chain than let’s say a 20″ BMX bike from Walmart also the tires and rims look a little bigger on mine anyways any help I’d be great full

  2. I could be wrong but they look like Profile GDH. The stamp on the arm looks just like the profiles.

  3. Looks like profile to me too. See what size hex wrench fits to help confirm profiles as far as I know, or all standard most everything else will be metric

  4. HILLARYS_lT_GUY on

    100% Profile. You can vaguely see the stamp. It’s an older set of profiles, but profiles none the less. Not to mention the profile bolts.

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