Dura Ace 9000 hubs

Discuss light weight issues concerning road bikes & parts.
bm0p700f
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by bm0p700f

CX-ray's do fit but it is tight and Paolo probably does not like that. 24H rears should be done 2x. 3x will just lead to problems down the line so it is not even worth thinking about it. Getting normal spokes in is tight on the rear but still nice hubs. I did a build with light rims and I did not feel the overall lateral stiffnes was poor. The NDS flange has moved out a fair bit from the 7900 design and the flange seperation is more 56 or is it 57mm (I can't remember) anyway it is good enough for shallower rims than 38mm in my opinion anyway.

bikerjk
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by bikerjk

I'm thinking of using these hubs with a Kinlin XR-200 rim in 24f, 28r, Sapim CX-Ray all round, brass nipples. Can the front hub take a radial spoke lacing? Thinking 2x both sides for rear. Any suggestions?

Svetty
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by Svetty

Apologies for the grave dig (and noob question) but found this thread when trying to calculate centre to flange distances. As quoted on the first page of the thread, Shimano quote "flange distance" and "dish" dimensions. How do I use these to arrive at centre to DS and centre to NDS flange distance measurements?

Svetty
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by Svetty

Anyone?

bricky21
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by bricky21

The numbers you're looking for are posted on the first page. 16.5mm DS and 36.5mm NDS.

Svetty
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by Svetty

bricky21 wrote:The numbers you're looking for are posted on the first page. 16.5mm DS and 36.5mm NDS.


Those are quoted for a 24h hub; the dimensions for a 28h are slightly different - at least the flange distance and dish measurements are different (56.9 & 9.75 vs 56.5 & 9.95). I'm afraid I don't know how to translate these into LH and RH flange to centre measurements as I am uncertain what 'real world' dimensions they refer to.

bricky21
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by bricky21

Thats a new one to me. Flange spacing doesn't vary between hole counts. What would be the point?

Svetty
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by Svetty

bricky21 wrote:Thats a new one to me. Flange spacing doesn't vary between hole counts. What would be the point?


Ask Shimano, it's their specs! I might speculate that the flange thickness might vary but frankly I don't know what I'm talking about here - in case you hadn't guessed :D

What I'm really asking is how do you calculate the distances from the spec numbers given - what is the equation/what do the numbers 'flange distance' and 'dish' mean when used by Shimano?

petal666
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by petal666

Use the numbers provided a few post up and forget about and 'differences' as if they exist, they are minute.

bricky21
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by bricky21

(56.9 / 2) + 9.75 = 38.2 (NDS offset)
(56.9 / 2) - 9.75 = 18.7 (DS offset)
(56.5 / 2) + 9.95 = 38.2(NDS offset)
(56.5 / 2) -9.95 = 18.3 (DS offset)

Those are to the outside of the flanges though so you need to subtract to get the center. I subtract 1.7 mm. 36.5/16.5(16.9) for Dura Ace hubs

uncle-gee
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by uncle-gee

Was wondering, with the new pre-load adjustment on the 9000 hubs, does the clamping force of the quick release affect the pre-load adjustment?

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Horze
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by Horze

uncle-gee wrote:Was wondering, with the new pre-load adjustment on the 9000 hubs, does the clamping force of the quick release affect the pre-load adjustment?


Yes it does. With all hubs in fact.

Don't overtight skewers as that just exacerbates bearing wear.

In fact what I do with Shimano hubs is to leave a tiny amount adjustment or play in the bearing preload so that when the wheel is fastened in the frame, the skewer will take up the slack in the hub.

Shimano produced the most stable hub in the FH-7800 (10 Speed) with a 60.2mm flange separation and we haven't seen anything like it from Shimano since.
7x Forum Racing Ban Champion.

Mackers
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by Mackers

Not even close.
50mm inside to inside, 56mm outside to outside.

pdlpsher1
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by pdlpsher1

uncle-gee wrote:Was wondering, with the new pre-load adjustment on the 9000 hubs, does the clamping force of the quick release affect the pre-load adjustment?


I just purchased a set of the C50 wheelset. While doing some buying research the marketing materials say the new hub on the C50 puts the skewer clamping force directly on the axle only. So the bearing preload is independent on the skewer clamping force.

bm0p700f
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by bm0p700f

I have that too when setting the up. Leave play and once clamped there is still play. Take wheel out and re adjust.

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