Question for changing cassette on my Platypus - can I reuse spacers and will they work on SRAM vs. Shimano 9 speed Cassettes

[Jay LePree]

Hi all:

I changed my chain after it showed 0.5 wear on my Park tool chain checker.  I notice I am skipping under load on my favorite rear cog.  (My Platypus is set up with a Blue Lug Triple, and I tend to shift upfront for big jumps and less on the rear.)  I am a bit surprised as I normally get two to three chains out of a cassette, but such is life.

I have watched the Park tool videos which are really helpful, but before I get in over my head, assuming a spacer is used, can I re-use it and keep it in the same space assuming I am swapping out a 9 speed cassette for another 9 speed cassette.  (I am not sure if the original is SRAM or Shimano, and it seems easier to get Shimano in the same gearing as the original.) 

I use a bitex rear hub, Dura-Ace 9 speed shifters (set to index) and a Deore rear Derailler. 

Thanks for your help,

Jay LePree

Demarest, NJ

[Joe Bernard]

Yep. If there's a spacer there now cuz the Bitex will accept 11/12-speed cassettes, said spacer will work with another Shimano or SRAM 9-speed.