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JIS and ISO square taper bottom brackets differ in their spindle length and taper angle. JIS bottom brackets have a shorter spindle length and a 2-degree taper angle, while ISO bottom brackets have a longer spindle length and a 1.5-degree taper angle. These differences affect compatibility with cranksets and require matching components for proper installation.

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5mo ago

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Square taper and JIS square taper bottom brackets differ in their dimensions and compatibility with cranksets. Square taper bottom brackets have a 2-degree taper angle, while JIS (Japanese Industrial Standard) square taper bottom brackets have a 1.5-degree taper angle. This difference affects the compatibility of cranksets with the bottom bracket spindle. It is important to match the type of bottom bracket with the corresponding crankset to ensure proper fit and performance.


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