The taper on an ISO and JIS axles are different. Basically a Campag chainset will go on less on a Shimano BB and a Shimano chainset will go on further on a Campag BB. Many will say this makes them incompatible but as with many bike parts in practise they can work fine together. The only way I can get the chainline and clearance on my Chameleon SS spot on is by using a Shimano BB. The Centaur cranks take a little bedding in but it all works perfectly with no creaking or loosening.
The taper on an ISO and JIS axles are different. Basically a Campag chainset will go on less on a Shimano BB and a Shimano chainset will go on further on a Campag BB. Many will say this makes them incompatible but as with many bike parts in practise they can work fine together. The only way I can get the chainline and clearance on my Chameleon SS spot on is by using a Shimano BB. The Centaur cranks take a little bedding in but it all works perfectly with no creaking or loosening.