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Thread: Zipp 404 end cap issue

  1. #1
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    Default Zipp 404 end cap issue

    Wheel built in 2017. Belongs to a pal. He removed the wheel from the bike and the whole cassette body slipped off with cassette locked on. Upon inspection the cassette was removed and the three pawls were replaced in cassette body, slid into place, and the end cap seems to fit "not so tight" on the axle. I have tried to examine SRAM's information on this however am dead ending. Does he need a new end cap? One that maybe fits a bit tighter? I have never seen this before and don't use ZIPP so thanks in advance. It is a carbon clincher using tubes.
    Tim Campen

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    Default Re: Zipp 404 end cap issue

    It wasn't a SRAM issue for me but I have a G3 powertap that this happened to. it loses the driveside end cap very easily and the cassette can pop-out easily as a result. it doesn't take much wear to take a tight pressfit to a loose slip fit.

    a new cap and possibly a new axle will solve the issue. I would also look for a missing o-ring or seal that's supposed to aide with retention. Otherwise just be careful when removing and installing the wheel.

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    Default Re: Zipp 404 end cap issue

    I'm not a Zipp hub expert but I recall all hub generations having threaded endcaps.

    This would be one of those situations where a few photos would really help

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    Default Re: Zipp 404 end cap issue

    As mentioned above see if the end cap has an internal rubber o-ring. They can be lost or stretch out over time. Make sure the lip seal that goes between the freehub body and cassette is clean and not twisted. Many of the wheels do need much force for the cassette/freehub body to just slide off.

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    Default Re: Zipp 404 end cap issue

    I pulled out the o ring and will match it up at a hardware store I think. This seems to be most likely the issue. Thanks to all who've answered.
    Tim Campen

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