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11 speed Ultegra cassettes for 10 speed wheels / freehubs
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Woolie




Joined: 24 Feb 2017
Posts: 6
Location: Goole

PostPosted: Thu Mar 09, 2017 10:07 pm    Post subject: Reply with quote

DarkSpeedWorks wrote:
Jorgan wrote:
I have a 1mm spacer on my DA7800 cassette on a Zipp 900 (10 speed) wheel; so I'd imagine in that case only 0.85mm needs to be shaved off? That said, I wonder if the cassette would rub against the hub body in that case. I get the impression that Ultegra cassettes are a different design, hence why people use those for conversion projects? I have both but have never held them side-by-side to compare.


No, that is not correct, the required spacer behind your 7800 cassette makes the 10-speed cassette equivalent in width to previous generation 8 and 9 speed shimano cassettes. So, if you need to put an 11-speed shimano cassette on a 8/9/10 speed wheel, 1.85mm needs to be milled off back of the 11-speed cassette.

On your other questions, I think most of the cassette modders prefer Ultegra over DA because on the new 11-speed cassettes the big cog carrier spider on Ultegra cassettes is a bit thicker than the one on DA cassettes. Also, with unmodified DA cassettes having had a less than stellar reliability record, some riders are less likely to want use them at all. But there might be other reasons as well.

About rubbing, the answer here is: it depends. I know that the cassette milling mod will NOT work with an 11-23 ultegra cassette if used on any generation of zipp 10 speed rear hub. However, it WILL work with an 11-25 cassette and the same zipp hubs. In this case, the issue is that the "spokes" of the cog carriers for the 23T cog get way too close the hub body. But for the 25T (and bigger) there is plenty of clearance.

Hope that helps.


Sorry, but you are absolutely wrong with your information. I have supplied many 11-23 Ultegra 11 speed cassettes to fit to Zipp 10 speed hubs. They work perfectly, with no interference whatsoever.

I'm quite prepared to supply cassettes on the basis that if they don't function perfectly, I give a full refund.
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DarkSpeedWorks




Joined: 10 May 2011
Posts: 133
Location: Chicago, USA

PostPosted: Fri Mar 10, 2017 12:02 am    Post subject: Reply with quote

Woolie wrote:
They work perfectly, with no interference whatsoever.


Sounds great, but if that is true, what is the clearance between the back of the 11-23 cassette and/or cassette spokes and/or cassette rivets and the zipp hub body and/or the hub spoke anchors?

Also, which model of zipp hub are you talking about here, zipp 182 or zipp 188 hubs?
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Chrace




Joined: 28 Apr 2010
Posts: 2426
Location: Eating a Yorkie

PostPosted: Fri Mar 10, 2017 9:22 am    Post subject: Reply with quote

Buzz_ wrote:
A quick google suggest my 2012 Mavic Cosmic Carbone SLs are 11 speed compatible. Anyone know if that is the case?

--

Mavic seems to be the one who is auto-compatible with a lot of their 10sp wheels. Buy an 11sp cassette and try it out? Probably cheapest method really. Or just borrow one from a friend to give it a test, then plop the wheel on his bike.

Also, good to see we still have some uber-geek battles on tritalk. Reminds me of Solar and various others getting in to a fight over correct hand entry... Smile
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Woolie




Joined: 24 Feb 2017
Posts: 6
Location: Goole

PostPosted: Fri Mar 10, 2017 10:11 am    Post subject: Reply with quote

No geek battles going on here mate.

I know what's possible because I do it. If anyone doubts it, then go your own way. It really is of no consequence to me. My life and livelihood doesn't revolve around cassettes. I'm simply trying to offer an alternative to those crappy EDCO ones. I can sell mine faster than I can get them, so that's all I'm going to say on the subject.

To respond about clearance on the Zipp hub, the answer is that there is clearance, and that's all that matters.
By far the bigger challenge is the Chris King hub, but my cassette fits those too.

Good luck.
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DarkSpeedWorks




Joined: 10 May 2011
Posts: 133
Location: Chicago, USA

PostPosted: Fri Mar 10, 2017 3:35 pm    Post subject: Reply with quote

Woolie wrote:
I know what's possible because I do it. If anyone doubts it, then go your own way. It really is of no consequence to me. My life and livelihood doesn't revolve around cassettes. I'm simply trying to offer an alternative to those crappy EDCO ones. I can sell mine faster than I can get them, so that's all I'm going to say on the subject.


No worries.
Neither does mine (revolve around cassettes), we actually do make some advanced triathlon accessories but nothing even remotely cassette related.

I just posted on our blog page ( http://darkspeedworks.com/blog-11speed.htm ) about a few ways on how to best solve the 10 speed vs 11 speed wheel dilemma as a public service to help other athletes with a similar problem. There is no financial gain for us by sharing this info, just a way for us to help and give back to the worldwide triathlon and cycling communities.

Greg @ dsw
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