Cannondale Expander Plug Differences

Discuss light weight issues concerning road bikes & parts.
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10Caad
Posts: 25
Joined: Wed Jan 15, 2020 7:10 am

Cannondale Expander Plug Differences

Post by 10Caad »

Long time lurker, first time poster. I just picked up a 2019 Supersix Evo for a steal to replace my old CAAD10. In moving over some of the parts I noticed that the expander on my CAAD10 was quite a bit lighter (15.4g vs 40.8g), but also has less surface area. In 4 years of riding I’ve never once had a problem so I’m wondering why Cannondale beefed up the Supersix Evo one and if there is any reason not to swap them out.
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nooski
Posts: 53
Joined: Mon Nov 29, 2010 9:24 pm
Location: Czech Republic

Re: Cannondale Expander Plug Differences

Post by nooski »

Heavier is a cheaper version. Cannondale did that in the past too. http://666kb.com/i/ct0kduy41ww2m447h.jpg

But be aware that I believe from MY18 there were changes in steerer thickness and the light KP017 does not fit inside. There are 2 new versions: K35009 (flat cap) and K35058 (receassed cap).
Dum spiro spero
my bike: viewtopic.php?f=10&t=130302

dannywin42
Posts: 110
Joined: Wed Jan 01, 2020 5:34 pm

Re: Cannondale Expander Plug Differences

Post by dannywin42 »

I'd bin the new one and get something better. I had nothing but problems with mine slipping in my synapse which lead to cracking the steerer in the fork. I used a very long one in the new fork to prevent slippage, thinks it's a campag one

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C36
Posts: 837
Joined: Fri Mar 03, 2017 3:24 am

Re: Cannondale Expander Plug Differences

Post by C36 »

nooski wrote:Heavier is a cheaper version. Cannondale did that in the past too. http://666kb.com/i/ct0kduy41ww2m447h.jpg

But be aware that I believe from MY18 there were changes in steerer thickness and the light KP017 does not fit inside. There are 2 new versions: K35009 (flat cap) and K35058 (receassed cap).
Cheaper is incorrect. The heavier was the one coming with the SSevo1 and with the SSe2 came the lighter version.

Regarding the « less contact area » it’s not a problem, the « fins » still support the pivot avoiding stem clamping compression forces to damage the pivot.


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Dan Gerous
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Re: Cannondale Expander Plug Differences

Post by Dan Gerous »

My 1st gen Evo came with the lighter version. I think they continued to use the older/heavier version in cheaper, more entry-level models after they introduced the lighter one but I might be wrong.

Both work well IMO, I have used the lighter one on most bikes for years without issues, even off-road. If they're installed and torqued correctly, they work fine, assuming the stems are also torqued correctly.

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