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Discussion Starter · #1 ·
I just got a new wheelset, Shimano Ultegra 6700. I mounted tubes, tires and cassette and had my bike on repair stand and noticed the free hub did move. I took the wheel off the bike and notice the cassette was locked.

Someone lead me in the right direction on figuring out whats wrong and how to fix.

thanks
 

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I've experienced the same issue. That cassette, and probably a number of other models like it, have splines cut that are much deeper than standard. Perhaps it was Shimano's solution to keeping it from digging into a soft aluminum freehub body.

The freehub spins easily with no cassette mounted on it. Once the Shimano cassette is installed and tightened down the largest cog is pressed against a seal or the spokes.

I believe the correct fix is a thin spacer behind the cassette but I haven't had a chance to try it myself.
 
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