Cannondale guru needed, Compression Plug Question

Discuss light weight issues concerning road bikes & parts.
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Charlie1025
Posts: 4
Joined: Thu Jul 24, 2014 2:23 am

by Charlie1025

Hi all,
Long time , first time.

2014 SS Evo Hi-Mod Frame set.

Did C-Dale use an even newer style compression plug for the steerer? On my previous bike I thought the top cap was 6mm and the bolt for the expanding wedge was 5mm.

On current bike, it seems the top cap is 5 mm and I would assume the bolt for the expanding wedge would be 4mm?

I found a similar looking expanding compression wedge on CannondaleExperts.com but the cap has an "F2" designation under the SI on the top cap. My top cap has an "L3" stamped on it. Is the torque value of 6.8nm the same as well?

Thanks for all the help.

by Weenie


ProEvoSLTeamHighMod
Posts: 65
Joined: Wed Feb 19, 2014 6:13 am

by ProEvoSLTeamHighMod

Torque spec remains the same; the "top cap" is revised to be much lighter (really nice machining), hence the 5/4 instead of 6/5 fitting - this is an upgrade on the nicer evo models.

Charlie1025
Posts: 4
Joined: Thu Jul 24, 2014 2:23 am

by Charlie1025

Great. Thank you.

deek
Posts: 406
Joined: Fri Aug 31, 2012 6:32 pm

by deek

The new one is so much better. It's about 15g vs the 50g for the old one.

martinko
Posts: 357
Joined: Fri Dec 06, 2013 9:08 am
Location: Slovakia

by martinko

Can you take a photo of it (or find one)?

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hmai18
Posts: 638
Joined: Mon May 15, 2006 12:19 am
Location: Vancouver, BC, Canada.

by hmai18

Old:
Image

New:
Image

martinko
Posts: 357
Joined: Fri Dec 06, 2013 9:08 am
Location: Slovakia

by martinko

Thanks. I have the old one and now I know how to shed few grams with this new one :)

Ltoddokc
Posts: 136
Joined: Wed Feb 20, 2013 7:37 pm

by Ltoddokc

I just built up a synapse hi-mod frameset with this same plug. When you say 6.8nm are you referring to the 4mm bolt or the 5mm? The 4mm should only be 4Nm according to the manual: http://media.cannondale.com/media/Synap ... en_low.pdf

numberSix
Posts: 67
Joined: Sun Sep 23, 2012 1:53 pm

by numberSix

If you sweat a lot, strongly recommend putting a bit of black electrical tape over the cap.
The steel expander bolt will seize to the aluminum lower body. No amount of anti-seize was enough.

Other than that, great, reliable lightweight part.

ParisCarbon
Posts: 804
Joined: Mon Feb 05, 2007 5:39 am
Location: Winnipeg Canada

by ParisCarbon

Just a question on this as I just installed one... I was riding today and was getting awful creaks from my headset.. when I got home I was able to put the allenkey in the plug and spin it free with no effort with the stem still tight..

I reinstalled everything, and I noticed as I tighten the FSA stem bolts the cap is not holding tight.. the compression is still there though..

I do have a 5mm spacer on top, and the cap is not touching anything...

As I was tightening the stem the last time I gave the cap a half turn.. it seems to be snug in there now... but it seemed to have backed off somehow before thus my creaking issue??

mattyNor
Posts: 273
Joined: Wed Mar 19, 2014 3:18 pm

by mattyNor

Try using some carbon paste on the plug to help add so friction. We had this issue with a few of the bikes in my shop.

ParisCarbon
Posts: 804
Joined: Mon Feb 05, 2007 5:39 am
Location: Winnipeg Canada

by ParisCarbon

mattyNor ahh good call.... will try that tonite!

goodboyr
Posts: 1388
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

Or just replace with an FSA compressor. Those cannondale plugs are terrible. There's another thread on this issue.
http://weightweenies.starbike.com/forum/viewtopic.php?t=127424

by Weenie


nickf
Posts: 535
Joined: Sat Mar 06, 2010 10:34 pm

by nickf

I used a ultrastar 2 with my caad9 premium full carbon fork. No problems at all. Bike came with the old style plug but that thing was a tank. Running a enve 1.0 with the ultrastar without any issues. Never used carbon paste, no slippage problems.

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