Dura Ace cassette compatibility
 

I recently got a pair of Ritchey WCS 58's, that have a shimano specific freehub body.

I'm trying to decide weather I should order the SRAM compatible freehub body, or just get a Dura Ace cassette.

I don't have any experience with DA cassettes, do they only work with the tall shimano specific freehubs or will it work with the shimano/sram compatible freehub on my American Classic Rd-205 hub also?

The other thing I'm confused about is if I can use an Ultegra cassette with the Shimano specific freehub?

I know the lower end Shimano cassettes don't work, but will Ultegra?

Can someone clear this up for me?

If you wanted to use SRAM cassettes (which don't have tall notches), or Shimano cassettes with less than 10 cogs (which also don't have tall notches), then you'd want to change the freehub body to the one that'll take both Shimano and SRAM cassettes. Shimano's 10-speed cassettes (including Dura-Ace, Ultegra and 105) would fit either freehub body, because their notches are tall enough to clear the Shimano-specific type, as well as the generic SRAM/Shimano type.