Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Wed Oct 26, 2016 7:18 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062

All times are UTC+01:00

Post new topic  Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Fri Jul 12, 2013 7:14 pm 

Joined: Fri May 02, 2008 5:39 pm
Posts: 1033
Location: Here, there and everywhere
Hi all,

I have just go hold of a Cannnondale Scalpel frame and am in the process of building it up with a 1x10 drivetrain.

A few things are giving me headaches, the biggest of which is the chainset/ chain guide/ chain line....

What I am trying to get working is:
32T e13 single front ring
e13 direct mount chain guide
Rotor 3D (triple cranks running the single ring in the middle ring position)
Cannondale bearings
Wheelsmfg BB30 to 24mm adapters
Xt/ XTR 11-36 10 speed cassette

With the cranks fitted correctly (wider spacer on the NDS) the 32T chain ring is very close (~2mm) to the chainstay and is far too close to the chain guide (the ring itself rub on the chain guide let alone the chain rubbing). There is no way I could run a bigger than 32T ring. On the plus side, the chainline is nice and the cranks/ pedals are central to the frame as they should be.

As a short term fix prior to taking it to the LBS I swapped the Rotor spacers on the cranks to put both the NDS and DS cranks further towards the DS. While the chain guide no longer rubs, the chainline is poor (not good in the biggest cassette cog) and both pedals are now 5mm over towards the DS (i.e. not central to the frame and lop sided to the DS). This is an issue for me due to knee probems (trust me on this- I have had a lot of fits and put a lot of time in to getting comfortable).

The only other options are:
1) Fit the Rotor cranks correctly but use the outer ring position to mount the chain ring to stop the rubbing on the chain guide. The problem with this is that the chainline is very poor especially in the biggest cog :(
2) Add a spacer between the bearings and DS crank to shift the chainring over a little. The issue with this that the axle isn't long enough for any spacers :(
3) Find a chain guide that is closer to the frame. Everything would be good then except for the very small clearance between chain ring and chain stay- I would always be limited to a 32T ring at the very most. I also don't know if such a chain guide exists.
4) New cranks and chain guide that are known to fit the Scalpel with 1x10. Downside is obviously the cost

Any ideas how to get a Scalpel running 1x10?

Thank in advance, DanW

PostPosted: Sat Jul 13, 2013 12:28 am 

Joined: Wed Jan 18, 2012 4:23 pm
Posts: 759
Location: Midlands, United Kingdom
Have you measured the chainline? That would be my first step, then you know if it's a crank or guide issue!

Sounds like the adaptors are not quite right or maybe the bearing shell is off slightly?

Impoverished weight weenie wanna-be!
Budget 26" HT build viewtopic.php?f=10&t=110956

Posted: Sat Jul 13, 2013 12:28 am 

PostPosted: Sun Jul 14, 2013 10:43 am 

Joined: Fri May 02, 2008 5:39 pm
Posts: 1033
Location: Here, there and everywhere
I have bodged a temporary chain guide/ crank solution (filing the chain guide back plate) but the 32T ring still has just 1mm or less clearance from the chainstay which does not fill me with any confidence.

Foolishly I assumed cranks would be made with sensible chainlines!

The e thirteen XCX is adjustable for chainlines 49-53mm.

I measured the Rotor chainline around 49mm and their notes say it is 48.5mm. That seems quite small and most likely the Scalpel frame was never designed for such a small chainline (even if the chainguide should in theory be close to fitting).

I think that is my problem!

Solution? Something with a 50-51mm chainline I think.

Running through the cheapish BB30 options the best seems to be SRAM XX1/ X0 with an Absolute Black Spiderless ring. 51mm chainline, £250 all in, ~510g. Hollowgrams would be nice but will be at least £450-500 even with buying the arms second hand (~495g with the same spiderless chain ring set up).

Does all of that sound correct?

Many thanks again!

Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 3 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. 160mm lightweight rotor guide please

in Road




Sun Nov 08, 2015 1:30 am

bm0p700f View the latest post

There are no new unread posts for this topic. 2016 Cannondale Scalpel-Si

in MTB




Mon May 09, 2016 5:25 am

grover View the latest post

There are no new unread posts for this topic. 3D+ Rotor cranks with new cassette

in Road




Thu May 19, 2016 11:12 pm

TomColnago View the latest post

There are no new unread posts for this topic. Attachment(s) Removing the graphics on Rotor 3D+ Cranks - help!

in Road




Thu Feb 18, 2016 8:07 pm

wheelsONfire View the latest post

There are no new unread posts for this topic. Power2max type s and rotor 3DF crankset or Rotor INPOWER

in Road




Tue Nov 17, 2015 6:00 pm

Mario Jr. View the latest post

All times are UTC+01:00

Who is online

Users browsing this forum: No registered users and 13 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:  
Powered by phpBB® Forum Software © phpBB Limited