Hope Pro II has an aluminum carrier, which means you have to either get a SS carrier from hope, or run blingy cassettes with 1 piece carriers, like SRAM 990 11 x 34 or Shimano with the 5 arm 1 piece carrier for gears 1 through 6. Use cheap cassettes and it will gouge the carrier and you'll be hating life when it comes time to remove the cassette for replacement. Don't ask me how I know this. :madman: