stem length vs angle
#1
carbon is too light
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stem length vs angle
Are stems measured from 'center to center', or are they measured in horizontal distance. I know this doesn't make much of a difference with small angle stems, but with a 30° angle it could be a huge difference.
#2
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It's center to center. You can calculate the actual reach, or use the chart:

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Depends on the stem. Most seem to measure extension but for example 3T appears to use reach.
#7
carbon is too light
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I guess I could start a new thread, but has anyone used a stem with only ~80mm reach on a TT bike? Just looking for anyone with anecdotal info on handling...