151 BCD cranks

Posted on Thu 5th, January 2012

• #1

nighthunte29

Just measured the center to center on on my chainwheel, and worked it out at roughly 90mm (88.8) which makes them 151 BCD, fantastic, but now im really confused, according to sheldon this appears on pre '67 campy parts. My cranks are actually Ofmega's, I tried looking up information but couldnt find anything, as i am convinced i must have measured it wrong, does anybody have any experience with 151BCD Ofmega's (if they exist would help) also, if anybody knows of any 151BCD chainrings, with 51+ teeth, im looking for one with shift assist pins, as shifting is where the problem is with my current one, cheers,
Sam
• #2

Sherms

First generation Dura Ace & Sugino Mighty track cranks are also 151bcd, you might be able to find some of those? They all have a very similar look of the old campy rings.
• #3

Thomas_M

As an alternative, print this and check with your chainring
http://www.1to1.dk/BIKE/bcd5bolt.pdf
• #4

Rodolfo

Don't you have a ring of which BCD you're sure of to test them with?
Which Ofmega's? ;)
• #5

nighthunte29

Im a plain idiot, the cranks are cotterless...

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