Just thought you would like a look at these. Marchisio sprockets are for the customer who wants a different sprocket range offered by Campagnolo or Shimano. Customers have these as a close ratio for the racing lads or a wide ratio for the touring crowd. As we know you always need the gear which is not there its either too small or too big a jump. This is where Marchisio comes in you can specify your own personal sprocket/gear range.