Shimano dura Ace 7800 free hub

spagforth
spagforth Posts: 17
edited February 2011 in Workshop
Hi Folks, I have just bought a second hand pair of Fulcrum Racing Zero's which appears to have a 7800 Dura ace free wheel. Consequently the SRAM cassette I have just bought won't fit and neither will standard shimano! Its definately shamano not Campag. Will i have to buy a dura Ace cassette now and if so will it be compatible with the rest of the drive train which is ultegra which I am running with a SRAM chain which i find better than Shimano's . I got the wheels for a really good price and they ar ein superb condition but I am loathe to spend £160 for a dura ace cassette. Otherwise I guess its rebuild the wheel onto an shimano/SRAM compatible hub.

All advice gratefully received

Spagforth :?

Comments

  • Rodrego Hernandez
    Rodrego Hernandez Posts: 1,436
    SRAM fits Shimano. If a SRAM cassette won't fit, it isn't a Shimano freehub. It can only be fitted one way though so make sure you are fitting it correctly.

    If it isn't fitting, it will be a Campagnolo freehub -Shimano ones are available so just go buy one of those.
  • mrdsgs
    mrdsgs Posts: 337
    I have a spare shimano pattern freehub for fulcrum zero wheels which definitely fits ultegra 10 speed cassettes. not sure about sram, but the ultegra casettes are about £45
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  • 2alexcoo
    2alexcoo Posts: 251
    Fulcrum wheels are supplied with either of the following freehub bodies:

    Campag 9/10/11 speed
    Shimano/SRAM 8/9/10 speed
    Shimano 10 speed only

    If it's definitely a Shimano pattern but a SRAM cassette won't fit, it's likely to be the Shimano 10 speed only freehub.

    It's odd that you say a standard Shimano cassette won't fit. All 10 speed Shimano cassettes are an identical fitment, so if an Ultegra or 105 won't fit then a Dura-Ace won't either.

    Can you post a picture of the freehub?
    Alex
  • spagforth
    spagforth Posts: 17
    Cheers Guys I can only think its a Campag hub despite my 'mate' who sold them to me said it was shimano. I have checked it against a shimano freewheel on a spare set of mavic kysiriums and theyare soooo different. My fault I should have checked more closely but then againnvvendor is a mate. I will be seeing him tomorrow to sort out.

    Mrdsgs, You mentioned you had a spare Fulcrum zero shimano hub. Is it red by any chance? If so I am interested.

    Cheers Spagforth :evil: :?
  • mrdsgs
    mrdsgs Posts: 337
    no, the freehubs are not red, they are a dull steel/metal colour whereas the campag one are shiny alloy, much deeper splines and one distinctive stepped L shaped spline/grove.

    Campagnolo make fulcrum wheels.

    The distinctive feature of the axle circumference is that is is not fully round. Similarly the inside of the freehub axle hole has a couple of flat spots so you have to line them up when fitting and removing.

    My zeros are, I think 2 years old and the spare freehub is boxed and other than checking it fitted it has not been used. It will definitely take an ultegra 10 speed cassette but I cannot guarantee it will fit your rear hub without knowing the age of your wheels.

    th simplest thing to do is to take your freehub off and post a photo of the underside of it, and the side view. I would then be able to confirm compatibility.
    Colnago Addict!
  • mrdsgs
    mrdsgs Posts: 337
    oh by the way, yes the HUB is red but we are taking about just the replaceable bit that the cassette fits onto (the freehub) that is what I have a spare of. Swapping them is very easy.
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  • mrdsgs
    mrdsgs Posts: 337
    http://www.fulcrumwheels.com/repository ... -12-08.pdf

    from this you can see the details page 14 part rs 013


    this is the part that i have


    http://www.totalcycling.com/index.php/m ... ub_S9.html
    Colnago Addict!

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