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Looseness in C'dale SI Crank

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Looseness in C'dale SI Crank

Old 03-03-07, 09:30 PM
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ALPhillips
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Looseness in C'dale SI Crank

I took my Synapse into the LBS where I purchased it to check some looseness in the crank. After a few minutes he told me he'd have to replace the whole SI compact crank and BB. Good news is C'dale is paying for everything and the bike is over a year old. He said this was a know problem and I'd be very pleased with the replacement. Was wondering if any others has had this problem.
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Old 03-04-07, 08:03 AM
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The mechanic did say the CF was separating from the metal.
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Old 03-04-07, 12:21 PM
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I had my 2006 C'daleSI Carbon crank catastrophically fail on my Six13 team 2. I was accelerating up a slight incline going about 27mph. the drive side rings and all snapped and flew off the bike. The arm and rings did one revolution, after it seperated from the bike, before it unclipped from my cleat and they smashed my leg and the frame before they went skipping down the road. Cannondale upgraded me to the Alloy version of the SI crankset and a new frame. It took a month for the bruising to go away but crap like this happens and as usual Cannondale took care of it fast .I had my bike fixed in like a week even though I had a hard time riding for a month. I'm really glad the rep switched me to the alloy crank, it is lighter , stiffer and stronger and you have to extract the arms after you remove the crank arm bolts.
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Old 03-04-07, 09:40 PM
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yes my carbon si cranks did the same thing. cannondale was going to replace them for free but i upgraded to the hollowgram si instead.
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Old 03-05-07, 08:39 AM
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My LBS said Cannondale will upgraded me to the Alloy version of the SI crankset as well. he also said no chance of major failure on a ride. I hope that new crank gets in quick.
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Old 06-24-07, 07:50 AM
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I bought a Cannondale Synapse about a month ago. This week four of the five crank bolts fell out while I was riding. Dealer fixed it but charged me $134.00 for parts. Anyone else have this problem? I ride a lot and have never lost crank bolts before.
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Old 06-24-07, 08:02 AM
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My left crank arm had the same problem it started shifting ever so slightly throughout my pedal stroke, carbon seperated from the alum insert. It was replaced and i went on my way.
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Old 08-16-07, 02:08 PM
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I bought an '06 SixThirteen Team 2 6 weeks ago, and just last week my left crank arm loosened and there was some "play" on it. My LBS replaced the three piece crank with a two piece carbon si crank (free), and all is better. I just hope the same thing doesn't happen again.

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Old 08-16-07, 02:26 PM
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Originally Posted by Dweezle View Post
I bought a Cannondale Synapse about a month ago. This week four of the five crank bolts fell out while I was riding. Dealer fixed it but charged me $134.00 for parts. Anyone else have this problem? I ride a lot and have never lost crank bolts before.
you mean the chainring bolts? $134!!
 
Old 08-25-07, 08:59 PM
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If i push or pull on one crank arm i can see the drive gears moving. Also there is now a clicking when i get to the bottom of the stroke on the non-drive side...... Is that what you mean by play? This is on a two week old C'dale CAAD9 with truvative cranks. I am new to the whole bike scene and am wondering if a trip to the LBS is in order for tomorrow. thanks.
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Old 08-25-07, 09:17 PM
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cranks

http://www.cpsc.gov/cpscpub/prerel/prhtml07/07206.html
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Old 08-25-07, 10:04 PM
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Originally Posted by doppelg View Post
I bought an '06 SixThirteen Team 2 6 weeks ago, and just last week my left crank arm loosened and there was some "play" on it. My LBS replaced the three piece crank with a two piece carbon si crank (free), and all is better. I just hope the same thing doesn't happen again.
its what we did with a customer's bike. Cdale sent us a replacement two piece left arm. The right side was ok.

i also cut through the defective crank arm. If you were wondering whats inside, its completely solid carbon. No Al spine, no foam, no airbladder, just all carbon
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