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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-23-07, 02:51 PM   #1
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Bottom Bracket spindle: ISO or JIS?

Is there a way to (visually or otherwise) tell the difference between ISO and JIS spindle tapers?

I have a 110mm KSS botom bracket that I need to replace, and finding specs on this unit is proving difficult. It's been mated to (and played nicely with) a pair of Dotek JB-PRO6-170 cranks.

Thanks to Sheldon Brown, (, I think I'm probably looking at JIS, but would be interested in first-hand knowledge.

On a side note: it's not the bearings that have gone bad, but the right side endcap; the stinkin' thing's plastic and started to break. (Anyone know if there are metal replacements available?)
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Old 05-24-07, 11:32 AM   #2
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Are there any markings on the spindle?
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