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  1. #1
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    Question to Zipp 404 owners

    I have a pair of Zipp 404 NSW's. I bought there wheels a few months back when I was about to transition from my Giant Defy to a TCR Advanced SL and Specialized Allez DSW Sprint. Before getting the two recent bikes the wheels spent about a month on the Defy and performed exceptionally without any flex. Now on the current bikes that are know to have stiff frames the wheels, speciallly the front, flex under moderate (500 watts or more) power. Yesterday I stopped off at a local Specialized/Giant/Zipp dealer. One of the guys there (a Zipp 404 owner himself) explained to me the flexing is pretty normal on his 404's mounted on his Time bike. Currently the Zipps are on my Allez and with my TCR rolling on Campy Bora Ultra 50's. The Ultras are exceptional. Absolutely no flexing on either bike, incredible in cross winds, and roll forever. Can Zipp 404 owners share their opinions and experiences?
    Thanks!

  2. #2
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    I own a pair of 808 Fire Crest and never had an issue with the brakes rubbing against the wheels.

    I've also tried a pair of Enve (aka Shi$$ty Edge wheels) 6.7 wheels and can confirm they are stiff AF but, rubbed against the brakes consistently.

  3. #3
    So. Calif.
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    How much is it flexing? 1mm would be inconsequential, 6mm too much.
    Any flex when you press rim side-to-side by hand?
    Wheel bearings set up too loose?
    Are spoke tensions in spec, measured with an actual gauge?

  4. #4
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    ^ This. If the wheels flex a lot, and particularly the front, something is wrong. Are you really rocking the bike back and forth much? I don't see my front flexing much at all.

  5. #5
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    Quote Originally Posted by stanseven View Post
    ^ This. If the wheels flex a lot, and particularly the front, something is wrong. Are you really rocking the bike back and forth much? I don't see my front flexing much at all.
    Just found through my LBS the spoke tension my wheels is 80KG. Zipp states all their wheel should be 100KG. Hope this helps otherwise the wheels are going back to Zipp.

  6. #6
    So. Calif.
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    Quote Originally Posted by Aeolite View Post
    Just found through my LBS the spoke tension my wheels is 80KG. Zipp states all their wheel should be 100KG. Hope this helps otherwise the wheels are going back to Zipp.
    There's usually a fairly wide +/- tolerance on tension, but yours do seem at the very bottom end of spec.

    Some Zipp notes I had from a few years ago indicated front wheel spec was 100 KG +/- 20%.

  7. #7
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    404 is pretty poor in this category.
    use a torque wrench

  8. #8
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    Quote Originally Posted by MMsRepBike View Post


    404 is pretty poor in this category.

    I just that this video a couple of weeks back. For now my dealer will send the wheels back to Zipp for testing. Will keep you guys updated.

  9. #9
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    I always run my brakes wider with carbon wheels. From Zipp to Cane Creek (with Zipp rims) to Hed to Chinese. Front wheel rub is particularly noticeable track standing with a lot of weight over the front wheel.

    I wouldn't call this a Zipp thing in my experience, just a deeper carbon rim thing.

    Many other guys I race with experience similar and open brakes accordingly.

  10. #10
    'brifter' is a lame word.
    Reputation: cxwrench's Avatar
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    Is the 'wheels/tires' section of the forum down?
    I work for some bike racers
    I've got some bikes, some guns,
    and a bunch of skateboards

  11. #11
    RoadBikeReview Member
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    Quote Originally Posted by Aeolite View Post
    Just found through my LBS the spoke tension my wheels is 80KG. Zipp states all their wheel should be 100KG. Hope this helps otherwise the wheels are going back to Zipp.
    The only effect that change in tension will trigger is the placebo effect.

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