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PostPosted: Mon Nov 18, 2013 10:21 pm 
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Joined: Sun Nov 14, 2010 10:25 pm
Posts: 482
After this winter a lot of worn gear is getting replaced and upgraded. seeking more ground clearance (which I've always found a touch inadequate) and a smoother drivetrain,

The Cannondale Flash is getting 650's and hollowgram Si's. Currently I like 27/40 rings with a 11-28 cassette.
Due to the larger circumference of the wheels, smaller chainrings are gonna be installed (even better ground clearance :exactly: ) . 24/36 setup sounds great because it not a big drop in teeth and should shift brilliantly.

To improve rear shifting and chain stability a Sram XO type 2 derailler sounds like the way to go. A short cage is my preference (again ground clearance, crisper shifting?), I know they recommend the short cage for single ring setups, but with the setup as described above I'd have 29 tooth capacity. Sram seems reluctant to put a number on tooth capacity, as I've not found this information.
As a reference Shimano Zee and Saint clutch type deraillers have a 25t capacity, so if crosschaining never occurs even those should funtion well I presume.
Could this potentially work or am I gonna have better shift quality with a medium cage?

Signed,
Completely on the fence :unbelievable:

_________________
  • 2011 Cannondale Flash F1
  • 2010 Cannondale Caad9
  • 2000 Caad 4 aero



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PostPosted: Thu Nov 21, 2013 2:14 pm 
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Joined: Sun Apr 22, 2012 8:23 pm
Posts: 36
QBP lists short cage as having a 30t capacity. Couldn't find info anywhere else to confirm though.


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PostPosted: Thu Nov 21, 2013 6:12 pm 
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Joined: Mon Mar 02, 2009 4:50 am
Posts: 709
With a cassette that small you'll be fine!
To be honest, I could never tell a difference when I switched my old bike to a short cage, so I wouldn't expect the shifting to be that much crisper. The type 2 rear derailleur will be a nice improvement though!


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PostPosted: Fri Nov 22, 2013 5:20 pm 
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Joined: Fri Nov 22, 2013 5:12 pm
Posts: 22
With that cassette you will be fine, if running anything bigger than a 32 or maybe 34, then you should go to medium cage


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PostPosted: Sat Dec 21, 2013 8:59 pm 
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Joined: Thu Jul 16, 2009 9:33 pm
Posts: 218
does anyone know,how much weight sram x7 type 2 short cage?? Is it possible that its lighter than x9 T2??


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