Bike Forums - View Single Post - Easy question: chainring compatibility
View Single Post
Old 06-22-09, 07:57 PM
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,354

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Likes: 0
Liked 13 Times in 11 Posts
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.

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.
operator is offline