campag chorus BB question

[reacher]

can any one tell me are their two types of chorus BB
i have seen a campag chorus BB and a campag double tapered BB , or was this just the way it was written in the adverts
whats the differance please

 

[Smokin Joe]

A BB for a Chorus triple chainset has an axle width of 111mm, a double uses a 102mm axle.

 

[reacher]

ok , thanks