We made our own 42t cog, called the BFC, and it's included in the Trail 1 and Enduro 1 build kits, also available on it's own, or as part of a drivetrain upgrade package for whatever you're riding now.what's the story with the cassette? I see a reference to 42t, but it's a 10 speed. What adapter are you including?
http://ridegg.com/wide-range-cassette-cog
http://ridegg.com/wide-range-cassette-cog-42-tooth-upgrades
If you look at post #182, it's in the pic, and it was on the bike that was used for the Vital review.
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