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Old 07-10-07, 10:03 AM   #1
bradberry00
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What taper Bottom Bracket do Sugino 75's use?

Ok looking at Sugino's website it says ISO taper, but looking around I see JIS mentioned quite often. So what is it ISO or JIS?
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Old 07-10-07, 10:39 AM   #2
yonderboy
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When in doubt, ask Sheldon Brown.

Basically, the NJS Sugino parts (75, Grand Mighty) are ISO, but the regular Sugino parts (RD, Zen) are JIS. You can run a mixed setup (I do) with mixed results. Read the above URL for more info.
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Old 07-10-07, 10:49 AM   #3
bradberry00
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ok cool, thats what i thought. Thanks
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Old 07-12-07, 07:35 PM   #4
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Your stupid to mix tapers. If you use a JIS taper crank on an ISO BB it wont snug up putting all the work on the bolt. If you run it vise versa you damage the crank arm forcing it onto the JIS taper spindle. You will also have an in correct chainline either way.

BB's are cheap, buy the right one.
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Old 07-13-07, 11:23 AM   #5
bradberry00
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i am buying the right one....thats why i asked which one the cranks take.
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Old 07-13-07, 11:37 AM   #6
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I use a Sugino 75 BB with my Sugino 75 Cranks. Works for me.
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Old 07-14-07, 12:00 AM   #7
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sugino 75's are ISO tapper (amazing eh?), but u can get away putting jis cranks in a s75 bb anyways, the only problem is that the cranks wont go that deep as they suppouse to....

Have fun....
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