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Technical FAQ: Installing Campagnolo cassettes

This is the fourth and final option to incorrectly align a Campy cog on a Mavic freehub. The cog has been rotated clockwise approximately 330 degrees around the freehub body from the correct position. As in the prior three incorrect positions, only the narrow stepped tab (under the “16A” and “CAMPAGNOLO” stamps) has a rail to push against, which could cause it to break under high chain loads. Photo: Lennard Zinn | VeloNews.com