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Dura Ace WH 7801 hubs...are there rims available for a build?

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Dura Ace WH 7801 hubs...are there rims available for a build?

Old 06-27-11, 11:48 PM
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theopowers
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Dura Ace WH 7801 hubs...are there rims available for a build?

I have inherited a set of WH-7801 Dura Ace hubs, which have nipples on the hubs. Can I get rims to build these up, and would it be worth it?
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Old 06-28-11, 12:15 AM
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Spares avaliable, yes, the part number is in the tech docs.

For worth it, probably not, these were not designed to be hand built, you don't say if you have spokes, as these are proprietary, and will also need to be sourced if you dont have them, the cost of the rim as a spare will probably be similar to a full replacement pair of wheels.
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Old 06-28-11, 01:34 AM
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Originally Posted by jimc101 View Post
Spares avaliable, yes, the part number is in the tech docs.

For worth it, probably not, these were not designed to be hand built, you don't say if you have spokes, as these are proprietary, and will also need to be sourced if you dont have them, the cost of the rim as a spare will probably be similar to a full replacement pair of wheels.
WTF?

Dura ace wheels are HANDBUILT at the shimano factory. How the F is that not designed to be handbuilt?
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Old 06-28-11, 02:00 AM
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If I was dumb enough to look into it, where would I go to price said parts? Can't find anybody selling Shimano rims and spokes online via Google.
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Old 06-28-11, 04:46 AM
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Originally Posted by operator View Post
WTF?

Dura ace wheels are HANDBUILT at the shimano factory. How the F is that not designed to be handbuilt?
They may be hand built at the factory, but they use entierly propietary parts, as can be see in the tech docs which makes them very hard for a wheel builder to service with regular tools / parts, as unique ones are needed.

https://techdocs.shimano.com/media/te...9830728257.pdf

For avalibiltiy of parts, any shimano service center should be able to get them, if you can is another matter

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Old 06-28-11, 09:49 AM
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When I was trying to rebuild a WH-7701, the spokes were available at $7 EACH.
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Old 06-28-11, 12:53 PM
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Mavic wanted $5 each for their Zicral 5mm spokes for Ksyrium SL's. If you have the hub, Mavic will rebuild your Ksyrium SL's with new rims and spokes for $250 and you cannot buy the rim anywhere. I'd imagine similar for Shimano.
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Old 06-28-11, 01:12 PM
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have a shop make you double ended spokes, use blue locktight on the nipple at the rim, and use any rim you want
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Old 06-29-11, 08:58 AM
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Originally Posted by operator View Post
WTF?

Dura ace wheels are HANDBUILT at the shimano factory. How the F is that not designed to be handbuilt?
And it was such a poor idea that shimano went back to the nipples in the rim and the bearings on the DS outboard.
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Old 06-29-11, 12:42 PM
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Straight pull spokes are available fairly easy. Drilling out a set of (alloy) nipples so that the spokes can be inserted through them and serve as anchors in a regular rim of compatible drilling rim shouldn't be too hard. Obviously there's a bunch of unknowns, but it appears doable, if not sensible.
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Old 06-29-11, 12:44 PM
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Originally Posted by merlin55 View Post
have a shop make you double ended spokes, use blue locktight on the nipple at the rim, and use any rim you want
I thought about this but thought the weight might add up. I guess the shimano version had a chunk of metal out there too though, huh? And I could use light nipples since durability during truing wouldn't matter...
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Old 06-29-11, 12:53 PM
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Originally Posted by dabac View Post
Straight pull spokes are available fairly easy. Drilling out a set of (alloy) nipples so that the spokes can be inserted through them and serve as anchors in a regular rim of compatible drilling rim shouldn't be too hard. Obviously there's a bunch of unknowns, but it appears doable, if not sensible.
I am torn between the sensibility of unnecessary effort and the sensibility of tossing a perfectly functional set of high end hubs.
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Old 06-29-11, 01:08 PM
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Originally Posted by theopowers View Post
I am torn between the sensibility of unnecessary effort and the sensibility of tossing a perfectly functional set of high end hubs.
Why not just stick them on ebay, some one elses problem then, get a pair of hubs which use standard parts?
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Old 06-29-11, 02:21 PM
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Originally Posted by jimc101 View Post
Why not just stick them on ebay, some one elses problem then, get a pair of hubs which use standard parts?
oh, under consideration for sure.
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Old 07-04-11, 08:03 AM
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Originally Posted by theopowers View Post
I am torn between the sensibility of unnecessary effort and the sensibility of tossing a perfectly functional set of high end hubs.

+1! been there, done that...
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