9 speed cassette on Dura-Ace FH-7403

[beansisfat@gmail.com]

I'm having problems with a 9 speed Dura-Ace cassette (12-27) on a Dura-
Ace FH-7403 freehub body. The freehub is originally an 8 speed but
everything I've read indicates that it should be compatible but it
doesn't seem to be.

When I put the cassette on, the top of the freehub body is still
visible and the lockring bottoms out before touching the cassette. It
seems as if there is a spacer missing from the back side of the
cassette as it also feels like it's too close to the spokes. Since
this cassette uses a spider for the largest three cogs, I would guess
that any spacing would be build into the spider.

I'm pretty sure I have the cassette assembled correctly as there is a
uniform spacing between each cog but this is stumping me. Any
thoughts?

--
Beans Baxter

[Joe Bernard]

On Jul 27, 2:21 pm, beansis...@gmail.com wrote:
> I'm having problems with a 9 speed Dura-Ace cassette (12-27) on a Dura-
> Ace FH-7403 freehub body. The freehub is originally an 8 speed but
> everything I've read indicates that it should be compatible but it
> doesn't seem to be.
>
> When I put the cassette on, the top of the freehub body is still
> visible and the lockring bottoms out before touching the cassette. It
> seems as if there is a spacer missing from the back side of the
> cassette as it also feels like it's too close to the spokes. Since
> this cassette uses a spider for the largest three cogs, I would guess
> that any spacing would be build into the spider.
>
> I'm pretty sure I have the cassette assembled correctly as there is a
> uniform spacing between each cog but this is stumping me. Any
> thoughts?
>
> --
> Beans Baxter

This happened to me with a Mavic Aksium wheel. A 1mm cassette spacer
[also known as a bottom bracket spacer] did the trick. It slides right
on the freeehub, then you install the cassette.

[bfd]

On Jul 27, 2:21 pm, beansis...@gmail.com wrote:
> I'm having problems with a 9 speed Dura-Ace cassette (12-27) on a Dura-
> Ace FH-7403 freehub body. The freehub is originally an 8 speed but
> everything I've read indicates that it should be compatible but it
> doesn't seem to be.
>
> When I put the cassette on, the top of the freehub body is still
> visible and the lockring bottoms out before touching the cassette. It
> seems as if there is a spacer missing from the back side of the
> cassette as it also feels like it's too close to the spokes. Since
> this cassette uses a spider for the largest three cogs, I would guess
> that any spacing would be build into the spider.
>
> I'm pretty sure I have the cassette assembled correctly as there is a
> uniform spacing between each cog but this is stumping me. Any
> thoughts?
>
> --
Interesting, it should work. Is this a Dura Ace cassette? If so, then
there is no need for a spacer on the "back side of the cassette" as
you correctly point out that the spacer is built into the spider.
However, if this is an Ultegra cassette, it comes with a spacer.

Otherwise, you may want to check Sheldon Brown's excellent articles
on:

Dura Ace compatibility:
http://www.sheldonbrown.com/dura-ace.html#cassettes

Cassettes:
http://www.sheldonbrown.com/k7.html

You may also want to go to parktool online repair manual to make sure
you installing it correctly. Good Luck!

[Qui si parla Campagnolo]

On Jul 27, 3:21 pm, beansis...@gmail.com wrote:
> I'm having problems with a 9 speed Dura-Ace cassette (12-27) on a Dura-
> Ace FH-7403 freehub body. The freehub is originally an 8 speed but
> everything I've read indicates that it should be compatible but it
> doesn't seem to be.
>
> When I put the cassette on, the top of the freehub body is still
> visible and the lockring bottoms out before touching the cassette. It
> seems as if there is a spacer missing from the back side of the
> cassette as it also feels like it's too close to the spokes. Since
> this cassette uses a spider for the largest three cogs, I would guess
> that any spacing would be build into the spider.

Yep, add a spacer and all will be fine.

>
> I'm pretty sure I have the cassette assembled correctly as there is a
> uniform spacing between each cog but this is stumping me. Any
> thoughts?
>
> --
> Beans Baxter

[Joe Bernard]

On Jul 27, 4:02 pm, bfd <bfd...@yahoo.com> wrote:
> On Jul 27, 2:21 pm, beansis...@gmail.com wrote:
>
>
>
> > I'm having problems with a 9 speed Dura-Ace cassette (12-27) on a Dura-
> > Ace FH-7403 freehub body. The freehub is originally an 8 speed but
> > everything I've read indicates that it should be compatible but it
> > doesn't seem to be.
>
> > When I put the cassette on, the top of the freehub body is still
> > visible and the lockring bottoms out before touching the cassette. It
> > seems as if there is a spacer missing from the back side of the
> > cassette as it also feels like it's too close to the spokes. Since
> > this cassette uses a spider for the largest three cogs, I would guess
> > that any spacing would be build into the spider.
>
> > I'm pretty sure I have the cassette assembled correctly as there is a
> > uniform spacing between each cog but this is stumping me. Any
> > thoughts?
>
> > --
>
> Interesting, it should work. Is this a Dura Ace cassette? If so, then
> there is no need for a spacer on the "back side of the cassette" as
> you correctly point out that the spacer is built into the spider.
> However, if this is an Ultegra cassette, it comes with a spacer.
>
> Otherwise, you may want to check Sheldon Brown's excellent articles
> on:
>
> Dura Ace compatibility:http://www.sheldonbrown.com/dura-ace.html#cassettes
>
> Cassettes:http://www.sheldonbrown.com/k7.html
>
> You may also want to go to parktool online repair manual to make sure
> you installing it correctly. Good Luck!- Hide quoted text -
>
> - Show quoted text -

I don't think they make a 12-27 Dura Ace cassette. He probably has an
Ultegra. I bought a new 12-27 9-speed Ultegra and it didn't come with
any separate spacer for the backside. Everything else about Dura Ace
7400 series is non-standard, so I'm guessing there's something a
little off with his hub, too.

[Beans Baxter]

On Jul 27, 7:02 pm, bfd <bfd...@yahoo.com> wrote:
> Interesting, it should work. Is this a Dura Ace cassette? If so, then
> there is no need for a spacer on the "back side of the cassette" as
> you correctly point out that the spacer is built into the spider.

It's a Dura-Ace cassette which is what has me so confused.

> You may also want to go to parktool online repair manual to make sure
> you installing it correctly. Good Luck!

I think it would be difficult to install it incorrectly. The largest
group of three cogs goes on first, then the next group of two,
followed, in order by cog - spacer - cog - spacer -cog - 12 tooth cog
- lock ring. With the keyed freehub body, it's impossible to put them
on wrong and as long as the order is right, what else could go wrong.
The spacing for all the cogs is dead on as well which is a pretty good
indicator that it's on in the correct order. There's just too much
freehub body. . .

[Beans Baxter]

On Jul 27, 7:12 pm, Joe Bernard <josephrbern...@sbcglobal.net> wrote:
> I don't think they make a 12-27 Dura Ace cassette. He probably has an
> Ultegra. I bought a new 12-27 9-speed Ultegra and it didn't come with
> any separate spacer for the backside. Everything else about Dura Ace
> 7400 series is non-standard, so I'm guessing there's something a
> little off with his hub, too.

It is definitely a Dura-Ace cassette. Sheldon lists it on his
cassette page and here's a link to a photo of one:
http://www.fullcycles.com/product_info.php/products_id/61

I've noticed the non-standard nature of the 7400 series but I didn't
think the freehub body would be afflicted by it as well.

[bfd]

"Beans Baxter" <beansisfat@gmail.com> wrote in message
news:1185578976.245537.309320@w3g2000hsg.googlegro ups.com...
> On Jul 27, 7:02 pm, bfd <bfd...@yahoo.com> wrote:
>> Interesting, it should work. Is this a Dura Ace cassette? If so, then
>> there is no need for a spacer on the "back side of the cassette" as
>> you correctly point out that the spacer is built into the spider.
>
> It's a Dura-Ace cassette which is what has me so confused.
>
>> You may also want to go to parktool online repair manual to make sure
>> you installing it correctly. Good Luck!
>
> I think it would be difficult to install it incorrectly. The largest
> group of three cogs goes on first, then the next group of two,
> followed, in order by cog - spacer - cog - spacer -cog - 12 tooth cog
> - lock ring. With the keyed freehub body, it's impossible to put them
> on wrong and as long as the order is right, what else could go wrong.
> The spacing for all the cogs is dead on as well which is a pretty good
> indicator that it's on in the correct order. There's just too much
> freehub body. . .
>
I wonder if you have an early freehub body. If so, it may require a
different body to use the 9 speed cassette. You may want to try another
cassette to see if it works. Or do like the other poster said and add a 1mm
spacer.

[Beans Baxter]

"bfd" <bfd853@comcast.net> wrote in
news:hb6dnadDp-AMNzfbnZ2dnUVZ_jSdnZ2d@comcast.com:
>
> I wonder if you have an early freehub body. If so, it may require a
> different body to use the 9 speed cassette. You may want to try
> another cassette to see if it works. Or do like the other poster said
> and add a 1mm spacer.

That would seem to fly in the face of the conventional wisdom that all
Shimano 8 speed freehub bodies are 9 and 10 speed compatible but it's
certainly a possibility. It is an early HG body with the UG threads on the
outside as well so the timing might be right. Was there a documentated
change in freehub body dimensions at some point?

[Joe Bernard]

On Jul 27, 7:48 pm, Beans Baxter <beansis...@gmail.com> wrote:
> "bfd" <bfd...@comcast.net> wrote innews:hb6dnadDp-AMNzfbnZ2dnUVZ_jSdnZ2d@comcast.com:
>
>
>
> > I wonder if you have an early freehub body. If so, it may require a
> > different body to use the 9 speed cassette. You may want to try
> > another cassette to see if it works. Or do like the other poster said
> > and add a 1mm spacer.
>
> That would seem to fly in the face of the conventional wisdom that all
> Shimano 8 speed freehub bodies are 9 and 10 speed compatible but it's
> certainly a possibility. It is an early HG body with the UG threads on the
> outside as well so the timing might be right. Was there a documentated
> change in freehub body dimensions at some point?

Conventional wisdom is out the window with anything involving 8-speed
Dura Ace.

[Qui si parla Campagnolo]

On Jul 27, 8:48 pm, Beans Baxter <beansis...@gmail.com> wrote:
> "bfd" <bfd...@comcast.net> wrote innews:hb6dnadDp-AMNzfbnZ2dnUVZ_jSdnZ2d@comcast.com:
>
>
>
> > I wonder if you have an early freehub body. If so, it may require a
> > different body to use the 9 speed cassette. You may want to try
> > another cassette to see if it works. Or do like the other poster said
> > and add a 1mm spacer.
>
> That would seem to fly in the face of the conventional wisdom that all
> Shimano 8 speed freehub bodies are 9 and 10 speed compatible but it's
> certainly a possibility. It is an early HG body with the UG threads on the
> outside as well so the timing might be right. Was there a documentated
> change in freehub body dimensions at some point?

It's one of the last UG freehubs that also had threads..just add a
spacer and all will work fine.

[Beans Baxter]

Qui si parla Campagnolo <peter@vecchios.com> wrote in
news:1185625950.777712.155060@e9g2000prf.googlegro ups.com:

> It's one of the last UG freehubs that also had threads..just add a
> spacer and all will work fine.

Is the 1 mm spacer width that was mentioned previously sufficient or is
there a specific width I should look for?

[Beans Baxter]

Qui si parla Campagnolo <peter@vecchios.com> wrote in
news:1185625950.777712.155060@e9g2000prf.googlegro ups.com:

> It's one of the last UG freehubs that also had threads..just add a
> spacer and all will work fine.

While we're on the subject of these somewhat oddball hubs, do you know of a
good source for cones?

[Qui si parla Campagnolo]

On Jul 28, 6:44 am, Beans Baxter <beansis...@gmail.com> wrote:
> Qui si parla Campagnolo <pe...@vecchios.com> wrote innews:1185625950.777712.155060@e9g2000prf.googleg roups.com:
>
> > It's one of the last UG freehubs that also had threads..just add a
> > spacer and all will work fine.
>
> While we're on the subject of these somewhat oddball hubs, do you know of a
> good source for cones?

Tough to find them as they, like lots of shimano hubs, have unique
cones. Out of production for over a decade.