Old 09-15-10, 10:07 AM
  #49  
merlinextraligh
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Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

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The recommendation is mostly coming form TREK.

http://velonews.competitor.com/2010/...r-tubes_121389

The theory is that the stem directly on the top of the headset causes a stress point.

Whether there is anything to it, it seems to me that a 5mm spacer under the stem is cheap insurance.

It would also appear that Saxo Bank's mechanics think that there is something to it. Otherwise they wouldn't have set up Cancellera's bike like that.
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Last edited by merlinextraligh; 09-15-10 at 10:13 AM.
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