Shimano: 9 speed rear hub compared to 10 speed.

I belive the OLN dimension is the same for a rear 9 speed hub as it is
for a 10 speed. Whats the difference then (apart from cost) ? Is a 10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?

MSeries Wrote:
I belive the OLN dimension is the same for a rear 9 speed hub as it is
for a 10 speed. Whats the difference then (apart from cost) ? Is a 10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?
OLN is the same.
Flanges are the same width on rear.
Cassette body is 1 mm narrower on 10 than 9 speed, but 10 speed cogs
are thinner and more closely spaced 1.6 mm thick for 10 speed, 1.78 mm
for 9 speed with spacing of 2.35 mm for 10 speed and 2.56 mm for 9
speed.
A 1 mm spacer is required when combining CS-7800
and CS-6600 (except junior type) with a 8/9 speed
freehub (FH) and FH-6600.
9 speed cassettes don't fit on 10 speed DURA ACE hubs due to the
serration size differences.
DURA ACE 10 speed uses aluminum cassette body and needs the deeper
serrations to have more surface area to handle the loads across the
softer material.
DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


--
daveornee

MSeries wrote:
I belive the OLN dimension is the same for a rear 9 speed hub as it is
for a 10 speed. Whats the difference then (apart from cost) ? Is a 10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?

Actually the 6600 and 7800 rear hubs are a wee bit different in flange
diameter and center to flange measurements. DA 7800 hubs use an
oversized aluminum axle, non-attached to the hub body freehub, and much
more expensive.

6600 hubs are almost identical to 6500 hubs, innard wise but with a
fatt, cheap looking hub shell.

daveornee wrote:
MSeries Wrote:
I belive the OLN dimension is the same for a rear 9 speed hub as it is
for a 10 speed. Whats the difference then (apart from cost) ? Is a 10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?
OLN is the same.
Flanges are the same width on rear.
Cassette body is 1 mm narrower on 10 than 9 speed, but 10 speed cogs
are thinner and more closely spaced 1.6 mm thick for 10 speed, 1.78 mm
for 9 speed with spacing of 2.35 mm for 10 speed and 2.56 mm for 9
speed.
A 1 mm spacer is required when combining CS-7800
and CS-6600 (except junior type) with a 8/9 speed
freehub (FH) and FH-6600.
9 speed cassettes don't fit on 10 speed DURA ACE hubs due to the
serration size differences.
DURA ACE 10 speed uses aluminum cassette body and needs the deeper
serrations to have more surface area to handle the loads across the
softer material.
DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


'stiffer?'......ygbsm...how did ya measure that? Larger spoke hole
radius? ya mean bigger holes? Ya need to get on yer bike more....


--
daveornee

daveornee wrote:
MSeries Wrote:

I belive the OLN dimension is the same for a rear 9 speed hub as it is
for a 10 speed. Whats the difference then (apart from cost) ? Is a 10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?

OLN is the same.
Flanges are the same width on rear.
Cassette body is 1 mm narrower on 10 than 9 speed, but 10 speed cogs
are thinner and more closely spaced 1.6 mm thick for 10 speed, 1.78 mm
for 9 speed with spacing of 2.35 mm for 10 speed and 2.56 mm for 9
speed.
A 1 mm spacer is required when combining CS-7800
and CS-6600 (except junior type) with a 8/9 speed
freehub (FH) and FH-6600.
9 speed cassettes don't fit on 10 speed DURA ACE hubs due to the
serration size differences.
DURA ACE 10 speed uses aluminum cassette body and needs the deeper
serrations to have more surface area to handle the loads across the
softer material.
DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


So will a 9 speed cassette go onto a 10 speed hub OK ?

MSeries Wrote:
daveornee wrote:
MSeries Wrote:

I belive the OLN dimension is the same for a rear 9 speed hub as it
is
for a 10 speed. Whats the difference then (apart from cost) ? Is a
10
speed cassette wider thus making the flanges closer together ? Is it
just the materials and weight ? Strength ?

OLN is the same.
Flanges are the same width on rear.
Cassette body is 1 mm narrower on 10 than 9 speed, but 10 speed cogs
are thinner and more closely spaced 1.6 mm thick for 10 speed, 1.78
mm
for 9 speed with spacing of 2.35 mm for 10 speed and 2.56 mm for 9
speed.
A 1 mm spacer is required when combining CS-7800
and CS-6600 (except junior type) with a 8/9 speed
freehub (FH) and FH-6600.
9 speed cassettes don't fit on 10 speed DURA ACE hubs due to the
serration size differences.
DURA ACE 10 speed uses aluminum cassette body and needs the deeper
serrations to have more surface area to handle the loads across the
softer material.
DURA ACE 10 is lighter than 9 due to the material difference. The
"10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


So will a 9 speed cassette go onto a 10 speed hub OK ?
Not on DURA ACE 10, but yes on Ultegra 10 FH-6600.


--
daveornee

On Sun, 27 Nov 2005 15:08:21 +1100, daveornee
wrote:

DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.

Err, no. The 7800 is several dozen grams lighter because of the aluminium
freehub body as opposed to steel on the 7700.

Jasper

Qui si parla Campagnolo Wrote:
daveornee wrote:
MSeries Wrote:
I belive the OLN dimension is the same for a rear 9 speed hub as it
is
for a 10 speed. Whats the difference then (apart from cost) ? Is a
10
speed cassette wider thus making the flanges closer together ? Is
it
just the materials and weight ? Strength ?
OLN is the same.
Flanges are the same width on rear.
Cassette body is 1 mm narrower on 10 than 9 speed, but 10 speed cogs
are thinner and more closely spaced 1.6 mm thick for 10 speed, 1.78
mm
for 9 speed with spacing of 2.35 mm for 10 speed and 2.56 mm for 9
speed.
A 1 mm spacer is required when combining CS-7800
and CS-6600 (except junior type) with a 8/9 speed
freehub (FH) and FH-6600.
9 speed cassettes don't fit on 10 speed DURA ACE hubs due to the
serration size differences.
DURA ACE 10 speed uses aluminum cassette body and needs the deeper
serrations to have more surface area to handle the loads across the
softer material.
DURA ACE 10 is lighter than 9 due to the material difference. The
"10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


'stiffer?'......ygbsm...how did ya measure that? Larger spoke hole
radius? ya mean bigger holes? Ya need to get on yer bike more....


--
daveornee
d is the diameter of the circle through the centers of the spoke holes
is 40 mm on HB-7800 and 38 mm on HB-7700.
Flange W is the hub width from the center of the wheel to the center of
the flange is 38.7 mm on HB-7800 and 37.0 mm on HB-7700.
I measured the stiffness by comparing two otherwise identical wheels
excepting the differences in the HB-7800 vs. HB-7700 hubs using the
Damon Rinard "wheel stiffness" measurement method.
I agree I should be riding more and answering less of the questions
that Peter can answer.


--
daveornee

Jasper Janssen wrote:
On Sun, 27 Nov 2005 15:08:21 +1100, daveornee
wrote:


DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.


Err, no. The 7800 is several dozen grams lighter because of the aluminium
freehub body as opposed to steel on the 7700.

Jasper

the 7700 freehub body is titanium, as is the axle.

"jim beam" wrote:

Jasper Janssen wrote:

daveornee wrote:

DURA ACE 10 is lighter than 9 due to the material difference. The "10
speed" HB-7800 is slightly heavier and stiffer than the "9 speed"
HB-7700 due to slightly wider flange spacing and larger spoke hole
radius.

Err, no. The 7800 is several dozen grams lighter because of the
aluminium freehub body as opposed to steel on the 7700.

Dave was referring to the front hub. The rear hubs have product codes
beginning FH.

the 7700 freehub body is titanium, as is the axle.

The body was titanium, but the rear axle was steel. XTR 950 rear hubs used
titanium axles.

James Thomson