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What's the correct Way to Measure Stem Length?(4 posts)

What's the correct Way to Measure Stem Length?BigFatSal
Jul 19, 2003 7:19 PM
I'm guessing center of the steerer tube hole to the center of the handlebar hole is proper measurement.... Is that correct? Thanks for clarification....
Yep. -nm.russw19
Jul 19, 2003 8:18 PM
An interesting question.Spoke Wrench
Jul 20, 2003 12:26 AM
There are actually two different measurements that are more or less commonly used.

The measurement that you described is called "extension" and is the one used by most vendors.

A measurement taken at right angles from the centerline of the steerer tube hole to the centerline of the handlebar hole is called "reach." On a 90 degree stem, they'll be the same. On a 130 degree stem, there will be a significant difference. Reach is a useful dimension to know if you are buying a threadless stem that has a lot of rise.
Yes, but.....Alexx
Jul 20, 2003 10:37 AM
Don't forget, it is the shortest distance from one to the other, NOT the distance along the stem (unless your stem is 90 degrees, that is).