Old 09-17-10, 10:41 PM
Jeff Wills
Insane Bicycle Mechanic
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Originally Posted by mazdaspeed View Post
The stem is about 20.7mm and the bars are about 22.3mm

The stem you have on your POS mountain bike has a double clamp for a straight mountain bar. It only works with handlebars that do not have a bulged center section, and will only clamp bars that are 22.2mm (aka 7/8") in diameter. I have never seen a drop handlebar that will fit that stem.

The "normal" mountain bike handlebar's clamp area is 25.4mm (aka 1") in diameter. Most road "drop" handlebars are 26.0mm or 26.4mm in diameter. Some older Japanese drop handlebars and most cheaper steel drop bars have a clamp area that is 25.4mm in diameter.
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