Bike Mielec

Thank you butchers dog!!! I meant the spindle length. I've read many stuff about it but I am in a mess.

The crankset I bought is the FSA Gimondi (you can see it in this link) http://www.velosolo.co.uk/gimondi.html

And I think the spindle lenght for a triple triangle frame in L size should be 107mm

But not sure at all!!

Thank you for your help. I owe some beers here already :)

the frame type or size has nothing to do with spindle length.
spindle length only depends on chainline, ie. rear hub and crankset.
search for 'transmission database' on here and see if someone else is running same hub/crank combination.