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Old 09-08-10 | 01:38 PM
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umd
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Joined: Sep 2005
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From: Santa Barbara, CA

Bikes: Specialized Tarmac SL2, Specialized Tarmac SL, Giant TCR Composite, Specialized StumpJumper Expert HT

The more common way to measure stems is by extension, i.e. along the axis of the stem, center to center of the clamps. Some stems measure by reach, which is the horizontal distance perpendicular to the steerer tube.

This should help.

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