Dura Ace Hub

Ricardo said:

I am confused. Maybe I am stupid. Confused and stupid. Can I put a new 10
speed Dura Ace setup on my bike with an Ultegra 9 speed hub? The only bike
store within 100 miles is Wal Mart. I have studied the Harris web site, Mr.
Brown and I still don't get it. I don't want to upgrade and then find that
the 10 speed cassette doesn't fit on my 9 speed hub. Thanks

Campy person not being authoritative, but I think I read somewhere that
the 10-speed cluster has longer "arms" to fit deeper splines in the
10-speed freewheel body. So, a 9-speed cluster would work on a 10-speed
freehub body, but the 10-speed cluster needs the deeper splines of the
10-speed body.

BTW, these deeper splines are supposed to be stronger and less
wear-prone than the shallower splines. It is not (necessarily) a dirty
business trick to force you to buy a new hub.

Ricardo said:

I am confused. Maybe I am stupid. Confused and stupid. Can I put a new 10
speed Dura Ace setup on my bike with an Ultegra 9 speed hub?

yes you can. use the supplied 1mm spacer, onto the freehub body first.

The only bike

Quoted message said:

store within 100 miles is Wal Mart. I have studied the Harris web site, Mr.
Brown and I still don't get it. I don't want to upgrade and then find that
the 10 speed cassette doesn't fit on my 9 speed hub. Thanks

richard said:

Ricardo said:

I am confused. Maybe I am stupid. Confused and stupid. Can I put a new 10
speed Dura Ace setup on my bike with an Ultegra 9 speed hub? The only bike
store within 100 miles is Wal Mart. I have studied the Harris web site, Mr.
Brown and I still don't get it. I don't want to upgrade and then find that
the 10 speed cassette doesn't fit on my 9 speed hub. Thanks

Campy person not being authoritative, but I think I read somewhere that
the 10-speed cluster has longer "arms" to fit deeper splines in the
10-speed freewheel body. So, a 9-speed cluster would work on a 10-speed
freehub body, but the 10-speed cluster needs the deeper splines of the
10-speed body.

here's the genuine dope for shimano 10s.
-DA 10s rear hub-Any shimano 10s cogset will fit-NOT shimano 8 or 9s
cogs.
-Any other 8s shimano HG hub-any shimano 8, 9 or 10s cogset will fit.

Ricardo said:

I am confused. Maybe I am stupid. Confused and stupid. Can I put a new 10
speed Dura Ace setup on my bike with an Ultegra 9 speed hub? The only bike
store within 100 miles is Wal Mart. I have studied the Harris web site, Mr.
Brown and I still don't get it. I don't want to upgrade and then find that
the 10 speed cassette doesn't fit on my 9 speed hub. Thanks

I don't know if you're confused or stupid, but your research skills
might need work. www.shimano.com has a FAQ and an illustrated 9/10
speed compatibility chart.

-Vee

Ricardo said:

I am confused. Maybe I am stupid. Confused and stupid. Can I put a new 10
speed Dura Ace setup on my bike with an Ultegra 9 speed hub?

Yes.

Sheldon "Short Answer" Brown
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