The best looking derailleur of the past 20 years. Shifts well in friction for 8, 9, 10, 11 speed. Indexes with Campy ten speed, but who has Campy ten speed? You can also get it to shift nicely with a Jtek 4, Shimano 10 speed road brifters or downtube shifters, and a ten speed Shimano compatible cassette. Perhaps even more useful: add a Shiftmate 9 and run Shimano 9 speed road or mtn shifters and a 9 speed Shimano or Sram cassette. If you are running friction, you don’t need a Shiftmate as long as you are using a decent friction shifter. You can combine a 9 speed chain, 8 speed cassette, this derailleur, and a 8 speed Shimano bar con, it will shift fine.
Perfect, lovely finish like most things Campy. All silver, for those purists like Adam.
Why so spendy? It’s been sitting in a warehouse, where every year the warehouse had to pay inventory tax, since 2007. That’s a long time ago. Also it’s Campy, also it’s rare. It’s cheaper and nicer looking than a new Chorus rear mech, and it will last longer. Splurge!
39t capacity. To determine what capacity you need, subtract your biggest rear cog from the smallest, and your big chainring from your smallest. Add them together. That’s chain wrap capacity. So a bike with a 11-34 cassette and a 44/28 chainring combo needs at least 39t of capacity. With anything bigger than a 30t rear cassette, add a Wolftooth Road Link to this derailleur. It’ll shift to a 36t cassette with a Wolftooth link.