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First Components Cassette Expander Cog
For those of us running 1x10 setups and looking for a wider gear range out of our cassettes, First Components throws another option into the ring. This cassette expander cog will turn your Shimano 11-36 XT or XTR cassette into an 11-42 allowing for a much lower climbing gear. This is accomplished by removing the 15T and 17t cog in your cassette, installing the expander cog and the 16T where your 15T and 17T came off. First Components kindly include a longer B-limit screw to allow your derailleur clearance t...
MPN: 7747073a1793b2c9758564e5ebfc5ee6
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