Dura-Ace 7 Speed HG cassette body?

Discussion in 'Cycling Equipment' started by David Ornee, Jan 23, 2003.

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  1. David Ornee

    David Ornee Guest

    Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I have
    a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D (126 mm)
    or number of speeds.

    David Ornee, Western Springs, IL
     
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  2. Jon Isaacs

    Jon Isaacs Guest

    >Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I have
    >a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D (126
    >mm) or number of speeds.

    I don't think there is such a thing. The first batch of DuraAce 8 speed hubs were also Uniglide. If
    you really wanted to you could remove the hub and have a machine shop cut one of the splines down so
    that an HG cassette would fit. Another option is to modify the HG cogs so they will fit on the
    Uniglide freehub.

    jon isaacs
     
  3. David Ornee queried:

    >>Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I
    >>have a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D
    >>(126 mm) or number of speeds.

    Jon Isaacs answered:

    > I don't think there is such a thing. The first batch of DuraAce 8 speed hubs were also Uniglide.

    That's correct, no sicha thing.

    See also http://sheldonbrown.com/dura-ace.html

    > If you really wanted to you could remove the hub and have a machine shop cut one of the splines
    > down so that an HG cassette would fit. Another option is to modify the HG cogs so they will fit on
    > the Uniglide freehub.

    The latter is more reasonable, but the hitch is that you still need the special small-diameter
    threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.

    That hub would make a nice candle holder, not much good for anything else, alas.

    We have some nice 126 mm 105 hubs on special, see: http://sheldonbrown.com/harris/hubs.html

    Sheldon "Sometimes The Answer Is 'No'" Brown +----------------------------------------+
    | The race is not always to the swift, | nor the battle to the strong | -but that's the way to bet.
    | | --Damon Runyon |
    +----------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
    617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com
     
  4. I wrote:

    >>The latter is more reasonable, but the hitch is that you still need the special small-diameter
    >>threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.

    Jon Isaacs replied

    > I guess I forgot to add that you need to use a Uniglide cog to lock the thing together.

    Not just "a" Uniglide sprocket, it has to be a _Dura-Ace_ Uniglide sprocket. The Dura-Ace Uniglide
    freehubs used a smaller thread to make it possible to fit an 11 tooth sprocket.

    > I forget this because I keep the old cogs and never seem to wear out the small cogs so I figure
    > everyone has a bunch of em.

    Most people wear out the small ones first, especially with Uniglide, where the flat cogs are
    reversible, so they wear twice as long!

    > I think I have a BNIB Uniglide 13-24 cassette in with my parts but I no longer have any bikes with
    > Uniglide freehubs so I guess it probably time to get rid of it and the rest of my Uniglide cog
    > collection...

    Uniglide splined sprockets fit just fine on Hyperglide Freehubs.

    Sheldon "Interchangeabilitude" Brown +-------------------------------------------------------+
    | Do what you can, with what you have, where you are. | --Theodore Roosevelt |
    +-------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com
     
  5. John Dacey

    John Dacey Guest

    On Fri, 24 Jan 2003 01:16:02 GMT, Sheldon Brown <[email protected]> wrote:

    >I wrote:
    >
    >>>The latter is more reasonable, but the hitch is that you still need the special small-diameter
    >>>threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.

    I've got a jar of these things here in 12 and 13 teeth. For years now, we've used them as ornaments
    on the shop Christmas tree.

    >Jon Isaacs replied
    >
    >> I guess I forgot to add that you need to use a Uniglide cog to lock the thing together.
    >
    >Not just "a" Uniglide sprocket, it has to be a _Dura-Ace_ Uniglide sprocket. The Dura-Ace Uniglide
    >freehubs used a smaller thread to make it possible to fit an 11 tooth sprocket.

    Eleven tooth Dura-Ace sprockets did not appear until 9 speed Hyperglide. There have been no
    first-position, _threaded_ elevens for the Dura-Ace freehub.
    -------------------------------
    http://www.businesscycles.com John Dacey Business Cycles, Miami, Florida Now in our twentieth year.
    Our catalog of track equipment: seventh year online
    -------------------------------
     
  6. A Muzi

    A Muzi Guest

    > >Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I
    > >have a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D
    > >(126 mm) or number of speeds.

    "Jon Isaacs" <[email protected]> wrote in message
    news:[email protected]...
    > I don't think there is such a thing. The first batch of DuraAce 8 speed
    hubs
    > were also Uniglide. If you really wanted to you could remove the hub and
    have
    > a machine shop cut one of the splines down so that an HG cassette would
    fit.
    > Another option is to modify the HG cogs so they will fit on the Uniglide freehub.

    Jon, you're usually so adept with vintage equipment!

    The original New Dura Ace series HB7400 was six/seven speed uniglide FW, FH7400 was 6/7 uniglide
    cassette. Later series 7402 is the "difficult" DA UG-eight speed , 7403 introduced the HG-8 body

    --
    Andrew Muzi http://www.yellowjersey.org Open every day since 1 April 1971
     
  7. Terry Rudd

    Terry Rudd Guest

    Jon Isaacs wrote:
    >>The latter is more reasonable, but the hitch is that you still need the special small-diameter
    >>threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.
    >>
    >
    >
    > I guess I forgot to add that you need to use a Uniglide cog to lock the thing together. I forget
    > this because I keep the old cogs and never seem to wear out the small cogs so I figure everyone
    > has a bunch of em.
    >
    > I think I have a BNIB Uniglide 13-24 cassette in with my parts but I no longer have any bikes with
    > Uniglide freehubs so I guess it probably time to get rid of it and the rest of my Uniglide cog
    > collection...
    >
    > Oh well..

    If you don't have one of these, Jon, I have a brand new 13x24 7 speed uniglide cassette, with the
    right spacers and the locking 7th cog. I won't be using this and would sell it if the the basenote
    poster can find the original freehub he asked about.

    Terry

    >
    > jon
     
  8. Terry Rudd

    Terry Rudd Guest

    Sheldon,

    What is the diameter of the locking cassette? I am not certain mine is Dura-Ace but would like to
    know if this guy comes to need it.

    Thanks in advance

    Terry (micrometer ready) Rudd :)

    Sheldon Brown wrote:
    > I wrote:
    >
    >>> The latter is more reasonable, but the hitch is that you still need the special small-diameter
    >>> threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.
    >>
    >
    > Jon Isaacs replied
    >
    >> I guess I forgot to add that you need to use a Uniglide cog to lock the thing together.
    >
    >
    > Not just "a" Uniglide sprocket, it has to be a _Dura-Ace_ Uniglide sprocket. The Dura-Ace Uniglide
    > freehubs used a smaller thread to make it possible to fit an 11 tooth sprocket.
    >
    >> I forget this because I keep the old cogs and never seem to wear out the small cogs so I figure
    >> everyone has a bunch of em.
    >
    >
    > Most people wear out the small ones first, especially with Uniglide, where the flat cogs are
    > reversible, so they wear twice as long!
    >
    >> I think I have a BNIB Uniglide 13-24 cassette in with my parts but I no longer have any bikes
    >> with Uniglide freehubs so I guess it probably time to get rid of it and the rest of my Uniglide
    >> cog collection...
    >
    >
    > Uniglide splined sprockets fit just fine on Hyperglide Freehubs.
    >
    > Sheldon "Interchangeabilitude" Brown +-------------------------------------------------------+
    > | Do what you can, with what you have, where you are. | --Theodore Roosevelt |
    > +-------------------------------------------------------+ Harris Cyclery, West Newton,
    > Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts
    > shipped Worldwide http://captainbike.com http://sheldonbrown.com
     
  9. David Ornee

    David Ornee Guest

    "Terry Rudd" <[email protected]> wrote in message news:[email protected]...
    > Sheldon,
    >
    > What is the diameter of the locking cassette? I am not certain mine is Dura-Ace but would like to
    > know if this guy comes to need it. Thanks in advance Terry (micrometer ready) Rudd :)

    > Sheldon Brown wrote:
    I wrote:

    The latter is more reasonable, but the hitch is that you still need the special small-diameter
    threaded top position sprocket to hold the 6 splined cogs on. These are no longer available.

    Jon Isaacs replied

    I guess I forgot to add that you need to use a Uniglide cog to lock the thing together. Not just "a"
    Uniglide sprocket, it has to be a _Dura-Ace_ Uniglide sprocket. The Dura-Ace Uniglide freehubs used
    a smaller thread to make it possible to fit an 11 tooth sprocket.

    I forget this because I keep the old cogs and never seem to wear out the small cogs so I figure
    everyone has a bunch of em.

    Most people wear out the small ones first, especially with Uniglide, where the flat cogs are
    reversible, so they wear twice as long! I think I have a BNIB Uniglide 13-24 cassette in with my
    parts but I no longer have any bikes with Uniglide freehubs so I guess it probably time to get rid
    of it and the rest of my Uniglide cog collection... Uniglide splined sprockets fit just fine on
    Hyperglide Freehubs.

    Sheldon "Interchangeabilitude" Brown +-------------------------------------------------------+
    | Do what you can, with what you have, where you are. | --Theodore Roosevelt |
    +-------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com

    Sheldon is correct, as usual. I need the Dura-Ace specific small screw on UG cog. It has an inside ~
    32 mm diameter. The diameter is such that the valleys in the casstte body are sligtly larger in
    diameter than the diameter of the Dura-Ace UR screw on cog. I have other UG cassette bodies that
    accept the larger diameter screw on small cog.

    What I need is at least one Dura-Ace specific screw on UG cog to allow me to use my New Old Stock
    hub on my old carbon fiber 126 mm O.L.D. frame.

    It would be just too easy if Shimano made the 7 speed HG cassette body that I have on my HG-20 hub
    interchangeable with my 7 speed UG Dura-Ace hub. David Ornee, Western Springs, IL
     
  10. dornee-<< Is there such a thing as a Dura-Ace 7 Speed HG cassette body?

    Don't think so-there are 8s uniglide, then hyperglide but when 7s-uniglide-

    AND cannot modify with a non-da freehub body but can use a 8s DA hyperglide freehub body on that DA
    7s uniglide hub...confused yet??

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
     
  11. I wrote:

    >>Not just "a" Uniglide sprocket, it has to be a _Dura-Ace_ Uniglide sprocket. The Dura-Ace Uniglide
    >>freehubs used a smaller thread to make it possible to fit an 11 tooth sprocket.

    A usually-reliable source replied:

    > Eleven tooth Dura-Ace sprockets did not appear until 9 speed Hyperglide. There have been no
    > first-position, _threaded_ elevens for the Dura-Ace freehub.

    Not surprising that you missed it, but back in the 6-speed days, early '80s, Dura-Ace featured an 11
    tooth option. I recall an article in Bicycling magazine by Frank Berto extolling the virtues of a
    "microdrive" touring gear setup he made back in the day, which featured the D-A 11, and "big"
    chainrings something like 42 or 44.

    I remember this well 'cause I thought it was a Bad Idea because of chain/sprocket wear issues, and I
    figured it was just a flash in the pan. I still believe it was a Bad Idea, but it has since become
    ubiquitous.

    Sheldon "A Bas l'Onze" Brown +----------------------------------------------+
    | Every person who has mastered a profession | is a skeptic concerning it. | --George
    | Bernard Shaw |
    +----------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
    617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com
     
  12. Grenouil

    Grenouil Guest

    "David Ornee" <[email protected]> wrote in message
    news:[email protected]...
    > Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I
    > have a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D
    > (126 mm) or number of speeds.
    >
    > David Ornee, Western Springs, IL
    >
    >
    >

    A bit of work with a file is all it needs to fit hyperglide freewheel sprockets on a seven speed D/A
    uniglide body. As pointed out though, you'll still need screw in/on first and second position
    uniglide sprockets. I've built a 14-28 and a 12-24 using D/A bodies and a combination of hyperglide
    and uniglide.
     
  13. Grenouil

    Grenouil Guest

    "Grenouil" <[email protected]> wrote in message news:[email protected]...
    > "David Ornee" <[email protected]> wrote in message
    > news:[email protected]...
    > > Is there such a thing as a Dura-Ace 7 Speed HG cassette body? If so, where can I attain one? I
    > > have a nice Dura-Ace 7 Speed cassette hub that I would like to update without changing the O.L.D
    > > (126 mm) or number of speeds.
    > >
    > > David Ornee, Western Springs, IL
    > >
    > >
    > >
    >
    > A bit of work with a file is all it needs to fit hyperglide freewheel sprockets on a seven speed
    > D/A uniglide body. As pointed out though,
    you'll
    > still need screw in/on first and second position uniglide sprockets. I've built a 14-28 and a
    > 12-24 using D/A bodies and a combination of hyperglide and uniglide.
    >
    >

    Whoops - cassette not freewheel - been a long day - sorry.....
     
  14. David Ornee wrote:
    >

    > Sheldon is correct, as usual. I need the Dura-Ace specific small screw on UG cog. It has an inside
    > ~ 32 mm diameter. The diameter is such that the valleys in the casstte body are sligtly larger in
    > diameter than the diameter of the Dura-Ace UR screw on cog. I have other UG cassette bodies that
    > accept the larger diameter screw on small cog.
    >
    > What I need is at least one Dura-Ace specific screw on UG cog to allow me to use my New Old Stock
    > hub on my old carbon fiber 126 mm O.L.D. frame.
    >
    > It would be just too easy if Shimano made the 7 speed HG cassette body that I have on my HG-20 hub
    > interchangeable with my 7 speed UG Dura-Ace hub.

    Check The Third Hand -- they had some not too long ago. I have a brand new small dia 12t DA UG
    screw-on that I bought by mistake.
     
  15. Jeff Wills

    Jeff Wills Guest

    Sheldon Brown <[email protected]> wrote in message
    news:<[email protected]>... <snip>
    >
    > Not surprising that you missed it, but back in the 6-speed days, early '80s, Dura-Ace featured an
    > 11 tooth option. I recall an article in Bicycling magazine by Frank Berto extolling the virtues of
    > a "microdrive" touring gear setup he made back in the day, which featured the D-A 11, and "big"
    > chainrings something like 42 or 44.
    >

    For true gearing dementia, there was a *five-speed* Dura-Ace cassette body that accepted a 11-tooth
    small cog. I ran across a couple of these while digging through the high, dusty shelves at Euro-Asia
    Imports. I think these were used on late Dura-Ace EX or early Dura-Ace AX hubs.

    11 to 15 straight block, anyone?

    Jeff
     
  16. Almost Fast

    Almost Fast Guest

    "David Ornee" <[email protected]> wrote in message
    news:<[email protected]>...

    > What I need is at least one Dura-Ace specific screw on UG cog to allow me to use my New Old Stock
    > hub on my old carbon fiber 126 mm O.L.D. frame.

    I have one genuine NOS Shimano Dura-Ace UG 12 tooth 7-8S screw-on cassette cog. Free to you!

    > David Ornee, Western Springs, IL

    What's the rest of your address?

    > It would be just too easy if Shimano made the 7 speed HG cassette body that I have on my HG-20 hub
    > interchangeable with my 7 speed UG Dura-Ace hub.

    No such luck. :-(
     
  17. John Dacey

    John Dacey Guest

    In response to my misguided effort to correct him, Sheldon Brown <[email protected]> wrote:

    >A usually-reliable source replied:

    Sometimes, even left-handed compliments are welcome.
    >
    >> Eleven tooth Dura-Ace sprockets did not appear until 9 speed Hyperglide. There have been no
    >> first-position, _threaded_ elevens for the Dura-Ace freehub.
    >
    >Not surprising that you missed it, but back in the 6-speed days, early '80s, Dura-Ace featured an
    >11 tooth option. I recall an article in Bicycling magazine by Frank Berto extolling the virtues of
    >a "microdrive" touring gear setup he made back in the day, which featured the D-A 11, and "big"
    >chainrings something like 42 or 44.

    I should've known it was a fool's errand to try to catch you in a misstep. If Shimano can bring out
    an eleven, retire it, and then bring it back after a dozen years in hibernation, can Bio-Pace III or
    Ten_Pitch_Redux be far behind?

    -------------------------------
    http://www.businesscycles.com John Dacey Business Cycles, Miami, Florida Now in our twentieth year.
    Our catalog of track equipment: seventh year online
    -------------------------------
     
  18. John Dacey wrote:
    >
    > In response to my misguided effort to correct him, Sheldon Brown
    > <[email protected]> wrote:
    >
    > >A usually-reliable source replied:
    >
    > Sometimes, even left-handed compliments are welcome.
    > >
    > >> Eleven tooth Dura-Ace sprockets did not appear until 9 speed Hyperglide. There have been no
    > >> first-position, _threaded_ elevens for the Dura-Ace freehub.
    > >
    > >Not surprising that you missed it, but back in the 6-speed days, early '80s, Dura-Ace featured an
    > >11 tooth option. I recall an article in Bicycling magazine by Frank Berto extolling the virtues
    > >of a "microdrive" touring gear setup he made back in the day, which featured the D-A 11, and
    > >"big" chainrings something like 42 or 44.
    >
    > I should've known it was a fool's errand to try to catch you in a misstep. If Shimano can bring
    > out an eleven, retire it, and then bring it back after a dozen years in hibernation, can Bio-Pace
    > III or Ten_Pitch_Redux be far behind?

    Can 110 and 110/74 cranks be far behind? ha ha.
     
  19. In article <[email protected]>, John Dacey
    <[email protected]> wrote:
    >I should've known it was a fool's errand to try to catch you in a misstep. If Shimano can bring out
    >an eleven, retire it, and then bring it back after a dozen years in hibernation, can Bio-Pace III
    >or Ten_Pitch_Redux be far behind?

    Positron is probably one of the best examples of Shimano reinvention.

    And speaking of that, I can only hope that the Front Freewheel will be making a comeback real soon,
    maybe with Bio-Pace III. :)

    --Paul
     
  20. Terry Rudd

    Terry Rudd Guest

    Good Point.

    I always thought this was great stuff. But then I ride rollers on 7 speed; winter train on 12x25
    stuff and hit summer with 12/27 or 14/27 there is minimal disparity!

    And yes, I have all of these cog sets .

    Jon Isaacs wrote:
    >>If you don't have one of these, Jon, I have a brand new 13x24 7 speed uniglide cassette, with the
    >>right spacers and the locking 7th cog. I won't be using this and would sell it if the the basenote
    >>poster can find the original freehub he asked about.
    >>
    >>Terry
    >
    >
    > I am not the guy that needs it. I'm the guy that used to have a bunch of bikes with 7 speed DA
    > uniglide freehubs and rode them for quite a few years, replacing cogs and cassettes as needed, all
    > without quite knowing how lucky I was to have the right parts in my parts boxes.
    >
    > Funny how much DuraAce stuff you find at garage sales when the people selling their junk have
    > names like Mark Allen, Julie Moss, Scott Tinley, Greg and Sian Welch..... <g>
    >
    > jon isaacs
     
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