Front chainring spacing difference between Shimano and Campagnolo? I want to upgrade my mid 80s road bike from a 50 tooth to a 53. But the BCD of the big triple chainring is some rare standard that it costs less to buy a whole (used) crank instead. And of course this saves some weight ;)
Currently the crank is a Sugino with Shimano Deore derailleurs and 105 indexed toptube shifters. I know that this will get me a 'empty spot' in my shifters. I now did get some really good deal on a Campagnolo Veloce 53/39 crank. Is this compatible with the Shimano tech? Thanks in advance.
Campagnolo cranks should work just fine. They use the same spacing between tha chainrings as Shimano cranks and work fine in practise from my experience.

Detailed explanation of bicycle cranks cross-compatibility.