Does anybody know if Sram 12sp mtb and road cassette have the same spacing?Another word, will their road cassette work with XD driver and mtb shifter? I understand I will prolly need a shorter derailleur.

I think the spacing is the same.

853stolen wrote on 06/04/19 at 12:20am:


The way I read your original post, I assumed you were already considering buying a 12 speed road cassette and a derailleur. 

Does that mean you already have a spare 12 speed XD road cassette? If that's the case, try installing it and let us know if/how it works. 

Other than dropping unnecessary unsprung weight, I suppose switching to a Sram 11 speed cassette would essentially be no different than just adjusting your limit screw to block use of the 50t cog on a Sram 12 speed. 

Sorry, I realize i'm not answering your question. My input may be unwanted. But hey, it's the internet, and i'm bored. Feel free to ignore me.

I'm just curious what you're trying to accomplish. Drop weight? Smaller steps between gear ratios? While I agree a 500% cassette range is kinda silly for Charlotte (or even for the mountains if you're reasonably fit), you aren't actually required to use all the gears on any given ride. I don't ride road, but based on my (limited) understanding of road gearing, I would think the close ratios would not be well suited to trail riding.