Back in the day, all mountain bikes had square taper bottom brackets and cranks. Modern bike makers have moved away from this style, but some still prefer it. This video will teach you how to install a specialty square-taper bottom bracket and crank on your mountain bike.
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Mountain Biking How to Install a square-taper bottom bracket and crank

By WonderHowTo
Jun 8, 2010 05:09 PM

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