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PostPosted: Tue Jul 29, 2014 8:55 pm 
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Joined: Thu Nov 10, 2005 5:31 pm
Posts: 3664
Location: Surrey B.C. Canada
I did a bit more digging and found this.

Image

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PostPosted: Tue Jul 29, 2014 9:21 pm 
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Joined: Thu Dec 09, 2004 5:51 pm
Posts: 166
Looked for the link from bike rumor and could not find it. don't know what happened to it. I remember because I went to Enduros website and the bearings for Treks that they talked about was not on there site, just figured they were not yet ready for retail yet.


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PostPosted: Tue Jul 29, 2014 9:46 pm 
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Joined: Tue Apr 05, 2011 6:57 pm
Posts: 51
Location: CHicago
ironman1 wrote:
Enduro is coming out with a set of 2 bearing per side to allow 30mm cranks to be used on Treks 90 mm wide shimano BB. I'm guessing very small bearings and the 2 races per side to help distribute the load. I believe it was on bike rumor a couple of weeks ago.


Glad to see that someone else saw it too and I am not loosing it.


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PostPosted: Tue Jul 29, 2014 9:54 pm 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2238
Location: Pedal Square
German "Cannondale Parts" shop has lots of crank spares, including a BSA BB (with axle) for Hollowgram cranks. The description says it is for Hollowgram MTB, but cannondale noob I am, I'm not seeing any reason to use it with a Hollowgram road crank. Shorter axles are available too. Unfortunately the parts have a very "Hollowgram aligned" pricing, if I may say so.

http://www.cannondale-parts.de/epages/6 ... 2KP094/%22

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PostPosted: Tue Jul 29, 2014 10:16 pm 
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Formerly known as CAADHEAD

Joined: Sun Dec 21, 2003 8:32 pm
Posts: 1462
Location: WALES,UK
Thats basically a Zipp VumaQuad BB with a MTB axle thats had the lip machined off, you'd need that length axle to run a road chainset on a BSA BB, your chain line and q factor are gonna suck :(

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PostPosted: Tue Jul 29, 2014 10:44 pm 
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Joined: Sun Jan 01, 2012 9:58 am
Posts: 387
HillRPete wrote:
I'm not seeing any reason to use it with a Hollowgram road crank.


your chainline will be +2.5mm, as will your Q (+2.5 per side that is), and you will need more spacers, but it should all bolt up and work.


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PostPosted: Wed Jul 30, 2014 10:36 am 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2238
Location: Pedal Square
mentok: the axle has 132mm. They are also offering a 128mm one, but one would have to mod away the lip, I guess. Another €70 unfortunately, but I'm kinda tempted, as my CAAD4 project frame has BSA.

Edit: some more info. 122mm axle is available from cannondale-parts.de, and seems to work up to 73mm BSA according to below (plus spacers). The next shorter axle on the site is 109mm, wondering if that would work on a 68mm BSA BB.

I ended up getting a hollowgram SiSl crank to work on my 73mm BSA crankset using a 122mm MTB hollowgram spindle and Zipp 30mm BB cups. Had to jerry-rig it with shims though, not ideal but it works.


Damn why am I always draw to such tinkering. Really want to try now.

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PostPosted: Thu Aug 07, 2014 4:12 pm 
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Joined: Mon Aug 11, 2008 10:08 pm
Posts: 351
Location: Hull
Anybody know if a sram red chain set will work with a bsa30 bottom bracket?


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PostPosted: Mon Oct 06, 2014 1:27 pm 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2238
Location: Pedal Square
Very close to getting going on this (got left and right crank arm from ebay separately for a great deal). As per above, a 122mm spindle works on 73mm BSA with spacers. Since I want to try this on 68mm BSA, 5mm width are saved already. Now I'm wondering if I could get away with a 109mm spindle.

What are the narrowest external BB cups that, or are they all the same?

Edit: Hmm there seems to be a 114mm Cannondale/SRAM spindle as well. Could that be the one to use requiring the least shimming?

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