Inner ring on Campy Triple what is BCD

[dana_e]

Anyone know the bolt circle diameter of the inner ring on campy triples?

Thanks DANA

[merckx]

It is 30.

Another triple question. What is the offset on the right taper on a Record asymmetric triple BB?

[dana_e]

74mm, per Sheldon Brown

[Bostic]

The pre 2012 triples are 135/74 bcd. The 2012 through current use the Shimano-esque 30t bolts to the 39t.

I don't know the offset on the Record asymmetric triple BB. However, on a well used Record Triple (been removed a few times), don't use a Centaur 111 symmetric. I used that and got the 30t ring to rub against the chain stay on my steel bike and tore through the paint.

[Ralph]

The Record and Chorus Triples of the early to mid 2000's use the ASymetrical 111 BB.

Centaur based ones (Veloce, Mirage, Racing T, Race, etc) used a 111 symetrical BB.

The mid 2000's and older Campy triples ALL used a 74 BCD small ring. I've got a couple extra 30 tooth if anyone needs one.