Topic starter
Specifically looking at Middleburn rings & spider. Is it a chainline thing? Cheers.
Posted : 26/06/2009 9:57 am
ATB is 110mm BCD - the diameter of a circle that goes through all the bolt holes
CD (5-bolt) is 94mm, CD (4-bolt) is 104mm
see http://www.sheldonbrown.com/gloss_bo-z.html#bcd
To confuse you, [b]road[/b] compact is the same as 'ATB' with a BCD of 110mm
Posted : 26/06/2009 10:08 am
Topic starter
That makes sense (mostly!), cheers.
Posted : 26/06/2009 10:32 am