HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 28 posts ] 
Go to page 1, 2  Next
Author Message
PostPosted: Mon Jul 25, 2011 8:59 pm 
Offline

Joined: Mon Dec 28, 2009 8:30 pm
Posts: 3869
Location: Bay Area
Will it work? Anyone tried it? Looking to run with a Hollowgram SRM.

_________________
Don't take me too seriously.
Bike
Strava


Top
 Profile  
 
PostPosted: Mon Jul 25, 2011 9:54 pm 
Offline

Joined: Sat Nov 22, 2008 11:15 pm
Posts: 670
I spoke to Rotor and they only guarantee that it will work with their 3D+ crank.


Top
 Profile  
 
Posted: Mon Jul 25, 2011 9:54 pm 


Top
  
 
PostPosted: Mon Jul 25, 2011 10:27 pm 
Offline
User avatar

Joined: Sun Jun 19, 2005 6:43 am
Posts: 3424
Location: Hilly, Hot, and Windy
no

starnut

_________________
"Don't pedal harder, pedal faster!"
Q-FACTOR IS A RED HERRING

BB30.COM


Top
 Profile  
 
PostPosted: Tue Jul 26, 2011 1:03 am 
Offline

Joined: Sat Sep 23, 2006 11:30 am
Posts: 89
Location: Melbourne, Australia
STARNUT wrote:
no


Hang on, what if he used a 122mm spindle for the hollowgrams? More spacers and wider Q-factor, but surely you could space it to work?

_________________
Start flat out ... then pick the pace up halfway


Top
 Profile  
 
PostPosted: Tue Jul 26, 2011 5:03 am 
Offline

Joined: Tue Sep 14, 2010 3:28 pm
Posts: 1404
scott_racer wrote:
STARNUT wrote:
no


Hang on, what if he used a 122mm spindle for the hollowgrams? More spacers and wider Q-factor, but surely you could space it to work?


This has been re litigated over and over and over and over and over and over and over and over and over and over again .

HOLLOGRAM CRANKS WILL NOT FIT A BSA FRAME WITHOUT SERIOUS MODIFICATIONS, AND THEY STILL WON'T BE IDEAL


Top
 Profile  
 
PostPosted: Tue Aug 30, 2011 10:33 pm 
Offline

Joined: Mon Jul 12, 2010 8:39 pm
Posts: 29
Location: Houston, TX
So please excuse my ignorance but if I were to use my Vuma Quad BB in my non/pre BBright Cervelo, still no dice w Hollowgram?

Thanks

_________________
SLC-SL.........12.98 and losing.......


Top
 Profile  
 
PostPosted: Wed Aug 31, 2011 2:44 am 
Offline
User avatar

Joined: Tue Dec 15, 2009 3:09 pm
Posts: 142
The spindle lengths won't be right. It's not just about spindle diameter and bearing ID. Lightning cranks probably would work with the Rotor BSA30 and Zipp bottom bracket cups, but even then I don't know for sure because Lightning cups are pretty thin.


Top
 Profile  
 
PostPosted: Thu Mar 14, 2013 10:26 am 
Offline

Joined: Thu Aug 23, 2012 1:12 pm
Posts: 16
Bump on this.
I run a hollowgram SRM but my team bike is BSA, and i don't get a power meter. So i want to fit mine.

Now I know it needs some modification, is anyone out there doing it currently?

I've seen the Rotor BSA30 bb and longer spindle idea.
Or the zipp package?
http://www.cannondale-parts.de/epages/6 ... ucts/KP094" onclick="window.open(this.href);return false;

Does anyone have any first hand experience.


I've seen this;
http://forum.slowtwitch.com/forum/Slowt ... _P4459895/


Top
 Profile  
 
PostPosted: Thu Mar 14, 2013 11:00 pm 
Offline

Joined: Tue Nov 11, 2003 9:47 pm
Posts: 1740
Location: Santa Cruz, California, USA
The extra wide axle might work. But what will the resulting Q factor be?


Top
 Profile  
 
PostPosted: Thu Mar 14, 2013 11:25 pm 
Offline

Joined: Mon Jul 30, 2012 10:33 pm
Posts: 38
I was just going to post about the wider spindle. Curious also if this would work with the Rotor BSA30 cups and a 68mm frame. I have a friend that is interested in trying this.

http://www.ebay.com/itm/Cannondale-SI-B ... 564a04a405


Top
 Profile  
 
PostPosted: Fri Mar 15, 2013 1:31 am 
Offline

Joined: Tue Nov 11, 2003 9:47 pm
Posts: 1740
Location: Santa Cruz, California, USA
The standard BB30 spindle is 27mm shorter. If the Q factor with that is 144mm, with the 131mm spindle it will be 171mm. Bleah.


Top
 Profile  
 
PostPosted: Fri Mar 15, 2013 4:07 pm 
Offline
User avatar

Joined: Fri Jul 23, 2004 8:24 pm
Posts: 1548
Location: Houston, Texas
Even with a longer spindle, an SRM Hollowgram is not going to work well on a BSA frameset. The Hollowgram spider has next to no overlap so using BSA30 or Zipp Vuma Quad bearing cups with a longer spindle, will simply push the spider and chainrings further out moving the chain further out from the correct chainline. I am of the opinion that there are two ways to get a Hollowgram crank to work on a BSA frameset: first would be to have the bottom bracket shell faced to remove material from each side (~5mm to 7mm per side) then use the BSA30 cups. Alternately, if we are talking about a carbon frame with a large enough diameter alloy insert, it seems like it you could have the bottom bracket shell milled/machined to accept Enduro's BB86/92 to BB386 EVO or Rotor's BB4130 bearings.

_________________
Michael - The Anaerobic Threshold is neither...


Last edited by ms6073 on Fri Mar 15, 2013 4:09 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Fri Mar 15, 2013 4:08 pm 
Offline

Joined: Thu Aug 23, 2012 1:12 pm
Posts: 16
Right but talking about Q factor, wouldn't that be the same as the BSA cranks that are on the frame originally?

And I'm sure this will work.
http://www.cannondale-parts.de/epages/6 ... ucts/KP094

Or if you can find a 128 axel and remove the shoulder it'd only need a few small spacers extra.


Top
 Profile  
 
PostPosted: Fri Mar 15, 2013 4:19 pm 
Offline

Joined: Thu Aug 23, 2012 1:12 pm
Posts: 16
If you say that it'll be well off on the chainline.
But wouldn't it put it int he same place, as bsa cups will be outside of the shell anyway, so they're in the same place when using rotor bsa30 cups. Longer spindle to accomodate this, and it'll put the chainring in near enough the same place.

I need to try it and see.
Unless anyone's done it.


Top
 Profile  
 
PostPosted: Fri Mar 15, 2013 4:30 pm 
Offline
User avatar

Joined: Fri Jul 23, 2004 8:24 pm
Posts: 1548
Location: Houston, Texas
skinnyrider wrote:
And I'm sure this will work.
http://www.cannondale-parts.de/epages/6 ... ucts/KP094" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;
Or if you can find a 128 axel and remove the shoulder it'd only need a few small spacers extra.


If you look at Cannondale's install diagram for Hollowgram cranks on a mountain bike with the SiSL spindle w/shoulder, note that a drive side spacer is required so for the BSA cups and the spindle without the shoulders, the cups replace the drive-side spacer and non-drive side offset produced by the shoulder on the spindle while maintaning close to the same chainline/q-factor.

skinnyrider wrote:
I need to try it and see. Unless anyone's done it.
I have SRM Hollowgram's on a BB30 and PF30 cross bikes and have become very familiar with the intricacies of the bottom bracket. I wanted to put one of these SRMs on my time trial bike which has a BSA 24 bottom bracket and I already have both the new 109mm SISL2 as well as an SiSL 104mm road spindle with the shoulder machined off, I purchased a Zipp Vuma Quad bottom bracket to give this a try. There is currently an SRM FSA K-Force Standard installed on the bike and even though I have not installed the Zipp bottom bracket, I can tell based on observation and static measurements, it would be a waste of time unless I at least first reduce the width of the bottom bracket shell on the drive side!

_________________
Michael - The Anaerobic Threshold is neither...


Top
 Profile  
 
Posted: Fri Mar 15, 2013 4:30 pm 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 28 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: Baidu [Spider], Google [Bot], Google Adsense [Bot], GooseNest and 51 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Rotor Flow vs Rotor 3D+ 2014

in Road

IchDien

9

2437

Tue Jul 15, 2014 3:21 pm

nd2rc View the latest post

There are no new unread posts for this topic. Hollowgram SI vs DA9000 Crankset

in Road

Ltoddokc

5

709

Sun Jun 22, 2014 4:43 am

Ltoddokc View the latest post

There are no new unread posts for this topic. Cannondale SI / Hollowgram compat

in Road

HillRPete

6

733

Mon Aug 04, 2014 2:21 pm

topflightpro View the latest post

There are no new unread posts for this topic. Chainrings for a Hollowgram Si chainset

in Road

Mr_Carlos

4

454

Wed Jan 15, 2014 11:57 pm

hmai18 View the latest post

There are no new unread posts for this topic. Hollowgram SiSl with SRAM 22?

in Road

TerribleCadence

2

597

Wed Jan 15, 2014 7:49 am

TerribleCadence View the latest post


It is currently Sat Nov 01, 2014 12:54 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB