BCD?

[the_bing]

Hi guys

What does BCD mean in terms of cranksets/chainrings? I'm in the market for new gear but I don't know what this means!

Muchas gracias

 

[Sharky]

Bolt circle diameter

http://www.sjscycles.co.uk/bolt-circle-diameter-size-chart-artlbcdchart/

 

[the_bing]

Rock and roll sharky