chainline question

[e-rider]

I just replaced a FSA pro gossamer chainset double with a Shimano 5600 double but the chainline is different. The shimano sits closer in towards the BB.

Does anyone know the chainline of these two chainsets? If they are the same perhaps I'm missing some spacers or something for the Shimano?

 

[Smut Pedaller]

As far as I know both these chainsets are the two piece style with the axle fixed to the drive side crank arm with an external cup type BB, correct? This should mean that as long as it is installed with the correct BB that it should be around 43.5mm or thereabouts. You can just measure it yourself to the centreline of the BB/seatpost
more info here for reference
http://sheldonbrown.com/chainline.html

 

[e-rider]

OK, so indeed, both my chainsets have a chainline of 43.5 mm BUT although I haven't actually measured them both, the Shimano chainline is definitely 1-2 mm less than the FSA even though they are both quoted at 43.5 in the spec - how can this be?

 

[MacB]

did you lose a little spacer somewhere along the way?

 

[RecordAceFromNew]

You can check what you have with this.

 

[e-rider]

You can check what you have with this.

the number 5 rings are not included with my chainset! perhaps this is the problem? Should I contact Merlin Cycles where I bought it or just attempt to buy replacements as I doubt they cost much (although probably impossible to buy I would think)