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WH-6600 Hub

Old 09-02-17, 05:01 PM
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Bikenut61
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WH-6600 Hub

I have a WH-6600 hub, which has raised splines halfway down the length of the spline. This came on a 2010 Roubaix. I would like to change the cassette, but cannot find compatible cassettes. Would a current model Ultegra 10sp freehub body fit on this hub?
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Old 09-02-17, 06:30 PM
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If it's a standard WH-6600, yes it will accept any 8,9 or 10-speed Shimano or SRAM cassette. I'm not sure what you mean by the splines being "half way" down the body unless someone changed the freehub body on yours for an older one.
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Old 09-02-17, 08:06 PM
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Originally Posted by HillRider View Post
If it's a standard WH-6600, yes it will accept any 8,9 or 10-speed Shimano or SRAM cassette. I'm not sure what you mean by the splines being "half way" down the body unless someone changed the freehub body on yours for an older one.

Down the length of each spline, halfway down the length the height of the spline increases. It is short the first hald, then doubles in size the rest of the way.

_____[------------
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Old 09-02-17, 08:41 PM
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Right: Shimano's short-lived 10-speed only freehub design. Will only accept 105, Ultegra and Dura-Ace 10-speed cassettes.

You can tell by looking at the deep splines on the larger cassette cogs.
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Old 09-02-17, 09:10 PM
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Shimano Ultegra WH-6600 Rear Wheel 9/10 speed Size 700x23C 20 Spoke | eBay
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Old 09-02-17, 11:10 PM
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No. The freehub is unique to that time frame. shimano gave up on that style rear hub.
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Old 09-03-17, 06:26 AM
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Originally Posted by Dave Mayer View Post
Right: Shimano's short-lived 10-speed only freehub design. Will only accept 105, Ultegra and Dura-Ace 10-speed cassettes.

You can tell by looking at the deep splines on the larger cassette cogs.
+1 I read it as a 6600 hub, not the complete prebuilt wheel.
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Old 09-03-17, 08:24 AM
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Correct, 6600 hub. So, will any 10sp freehub body work to replace the existing body?
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Old 09-03-17, 12:05 PM
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Originally Posted by Bikenut61 View Post
Correct, 6600 hub. So, will any 10sp freehub body work to replace the existing body?
I have disassembled about every Shimano hub ever made, but not the 6600. I have serviced 7800 hubs, which may be similar. The 7800 hubs contain very unique parts that are not cross-compatible with anything else. Hence why they clutter up Ebay year after year.

I suggest stocking up on 105, Ultegra or Dura-ace 10-speed cassettes.

BTW: The Ebay posting provided above is in error: the freehubs on the 6600 hubs are not compatible with any 9-speed cassettes from any vendors. Nor 8 or 11 speeds either.
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Old 09-03-17, 12:16 PM
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Originally Posted by Dave Mayer View Post
I have disassembled about every Shimano hub ever made, but not the 6600. I have serviced 7800 hubs, which may be similar. The 7800 hubs contain very unique parts that are not cross-compatible with anything else. Hence why they clutter up Ebay year after year.

I suggest stocking up on 105, Ultegra or Dura-ace 10-speed cassettes.

BTW: The Ebay posting provided above is in error: the freehubs on the 6600 hubs are not compatible with any 9-speed cassettes from any vendors. Nor 8 or 11 speeds either.

Dave, I cannot even find the correct 6600 cassettes. I would prefer Ultegra, 11-30t. Can you recommend a source for these?
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Old 09-03-17, 01:04 PM
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Originally Posted by Dave Mayer View Post
I have disassembled about every Shimano hub ever made, but not the 6600. I have serviced 7800 hubs, which may be similar. The 7800 hubs contain very unique parts that are not cross-compatible with anything else. Hence why they clutter up Ebay year after year.

I suggest stocking up on 105, Ultegra or Dura-ace 10-speed cassettes.

BTW: The Ebay posting provided above is in error: the freehubs on the 6600 hubs are not compatible with any 9-speed cassettes from any vendors. Nor 8 or 11 speeds either.
i posted an image of the freehub... the entire listing comes up instead... no info in the listing except to say that the wheel assy. is in good condition.... might be that the seller got flamed for posting info that was incorrect, then edited the listing....

i just wanted to end the discussion on whether the splines were taller, or not.... hadn't ever looked at the text in the listing...
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Old 09-03-17, 08:42 PM
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10sp cassettes of that generation maxed at 27t. There should be some out there. I have new 12-27 cassettes in CS-5600 and/or CS-6600 if you can't locate anything.
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Old 09-03-17, 10:46 PM
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If I understand the compatibility issue correctly, you can find CS-5600 12-27 cassettes on eBay for $70.00. Or you can replace your wheelset and then you have more options.

John
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Old 09-04-17, 05:32 AM
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I may have missed it but it's still not clear to me whether OP is talking about the hub from the prebuilt wheelset or the stand alone 6600 hub. Sounds like the prebuilt, don't think the stand alone ever came with the restrictive freehub. If it is the prebuilt, it won't swap for a different freehub.
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Old 09-04-17, 06:45 AM
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Originally Posted by shelbyfv View Post
I may have missed it but it's still not clear to me whether OP is talking about the hub from the prebuilt wheelset or the stand alone 6600 hub. Sounds like the prebuilt, don't think the stand alone ever came with the restrictive freehub. If it is the prebuilt, it won't swap for a different freehub.
That was my confusion too as I noted above. If he has the stand-alone HB-6600 is should take any 8,9 or 10-speed cassette. If he has the WH-6600 prebuilt wheel or a hub removed from one of those wheels, yes, it will have then taller, more limiting splines.
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Old 09-04-17, 08:53 AM
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I have the WH-6600 pre-built wheel.
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Old 09-04-17, 09:55 AM
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Originally Posted by Bikenut61 View Post
I have the WH-6600 pre-built wheel.
You are limited to the freehub body on it and the 10-speed cassettes that were designed to fit those taller splines.

That wheel's hub, and it's Dura Ace contemporary hub and prebuiit wheel (HB-7800 and WH-7800), used a different freehub and hub bearing design than any other Shimano freehub before or since. The drive side bearings were inboard of the freehub body, not at the outer end of the body, and these bodies are unique to these hubs.

The taller splines were used to let Shimano provide a lighter aluminum freehub body without the cogs gouging them. It was considered a failed experiment and Shimano quickly reverted to the outboard driveside bearing and steel or Ti freehub bodies with the older short splines.
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Old 09-10-17, 06:33 PM
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Originally Posted by desertdork View Post
10sp cassettes of that generation maxed at 27t. There should be some out there. I have new 12-27 cassettes in CS-5600 and/or CS-6600 if you can't locate anything.

I have not been able to find anything.
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Old 09-10-17, 07:26 PM
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Originally Posted by Bikenut61 View Post
I have not been able to find anything.
You didn't look very hard.

Here is one source: https://www.biketiresdirect.com/prod...CABEgJE0vD_BwE

And another: https://www.biketiresdirect.com/prod...CABEgJE0vD_BwE

And yet another: http://www.performancebike.com/webap...SA_Catch%20All
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Old 09-10-17, 07:28 PM
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[QUOTE=HillRider;19853226]You didn't look very hard.

Here is one source:


Thank you for the links!
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Old 09-11-17, 06:51 PM
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Here's a pic from the ebay ad..
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