I have 52/42, 53/41 , and 52/40 chain rings with 14-28 FW 5 &6 speed FW’s and they work well with the Campagnolo NR derailleurs but the one bike I have that has SR works a bit smoother and I didn’t have to run the rear wheel as far back in the drop outs. With the 52/40 crankset on my Motobecane I can just barely go big to big so I need to lengthen the chain. I just shift down my front derailleur more on that bike. I would love to triple the crank because I live on a very steep hill but I would have to get a longer cage and chain so I walk!