@jon. - plug it in to a ten speed mech.
Could also break an 11 speed sram road cassette, do away with the biggest cog, effectively making it a 10 with 11 speed spacing, right?
Not sure you could do away with the biggest as they are pinned on to a carrier? Might be able to lose one of the smaller cogs though.
Disclaimer I've never used a SRAM road 11 speed cassette.
@Howard started
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Could also break an 11 speed sram road cassette, do away with the biggest cog, effectively making it a 10 with 11 speed spacing, right?