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chamois creme addict
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Maybe

Hum Bum said:
Hi, I am planning on converting my 8speed cannondale to 10speed. I was wondering if my 8speed shimano 105 crankset will work with a 10speed chain and front derailleur. Thanks.
You might have a problem with the spacing between the little ring and big ring on the 8spd crank being too wide. It would be possible for the narrow 10spd chain to drop in there.

I did use 8spd Dura-Ace cranks with 9spd Dura-Ace chainrings on an otherwise Campy 10spd setup without problems. I would recommend that you change the inner chaingring as well, either to Shimano 9 or 10 spd. They are spaced to be a little closer to the big ring.
 
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