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Old 06-22-09, 07:57 PM
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operator
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Join Date: Jun 2004
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Bikes: 1987 Bianchi Campione

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Originally Posted by a_elephant View Post
Is BCD the *only* determinant of chainring/crank compatibility?

I'd like to buy a new chainring for my bike. The current one is 130 BCD, 3/32. Will *any* 130 BCD, 3/32 chainring fit?

This is for a fixed gear, so I know chainline can be an issue. AFAIK chainrings don't alter chainline, excepting for inside or outside attachment to the crank arm. Let me know if there's something else I need to think about here.

Thanks!
For a singlespeed crankset, in your situation any 130bcd 3/32 will work. Including all 8/9/10 speed "shimano compatible" rings and any "single speed" chainrings. Rocket rings etc. et al. Some of the cheaper chainrings *may* not fit properly even though they are the same bcd as your crank.

Doesn't happen very often but something to watch out for.
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