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Old 06-10-09, 08:23 AM
  #13  
BarracksSi
Bike ≠ Car ≠ Ped.
 
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Join Date: Jul 2007
Location: Washington, DC
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Bikes: Some bikes. Hell, they're all the same, ain't they?

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I have had this problem with a Truvativ Elita crank. Tall gear, stand to accelerate, and it drops, even with the FD adjusted within a hair of the chain.

I took it in, and was told that the crank spider was coming loose from the axle. I hadn't even put 500 miles on the bike (CAAD8), so they warrantied it. I chose a Shimano 105 compact as a replacement, and it hasn't dropped a chain in 1500+ miles.

Your Rival crank appears to have the same construction, so I'd consider using a different crank. I'd even keep my Shimano crank if I changed to SRAM shifters.
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