Hey Gang- I don't know what all the fuss is about with these Campy 41t SR/NR chainrings is about? I have one on my Colnago Super with over 5K miles on it, and it wears no more/no less than any other Campy product. Pure nonsense about them not fitting/needing filing/chain scratching/etc. This much I will say about them. If you do a lot/most of riding with SR/NR bikes like me, you will notice and appreciate the 41T vs 42T difference when going up hills. Take my word for it! Cheers, Dave Anderson