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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 09-09-07, 11:33 AM   #1
Iridestreet
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shimano bb

so i found a nos shimano D.A. crankset, the square taper variety. does anyone know what bb I need? Is it JIS or ISO?
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Old 09-09-07, 11:35 AM   #2
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You need UN-xx. Available at your local LBS. Shimano cart bb.
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Old 09-09-07, 11:50 AM   #3
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Shimano = JIS
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Old 09-09-07, 11:57 AM   #4
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Originally Posted by Iridestreet View Post
so i found a nos shimano D.A. crankset, the square taper variety. does anyone know what bb I need? Is it JIS or ISO?
Send it to me. I'll take a look at it for you...
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Old 09-09-07, 12:04 PM   #5
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You'll need a 109mm JIS spindle for those cranks. The DA 7600/7610 BB is kinda spendy, but if you can find someone that stocks a 109mm UN-73, you can get one for $40 or so.
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Old 09-09-07, 12:09 PM   #6
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yeah I figured that it'd be JIS, it's just that on sheldon's website, he mentioned that japanese njs cranks were often ISO, so I wanted to be certain.
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Old 09-09-07, 12:10 PM   #7
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You'll need a 109mm JIS spindle for those cranks. The DA 7600/7610 BB is kinda spendy, but if you can find someone that stocks a 109mm UN-73, you can get one for $40 or so.
How the hell do you know what length bb he needs? Clairvoyant?
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Old 09-09-07, 12:15 PM   #8
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How the hell do you know what length bb he needs? Clairvoyant?
http://www.businesscycles.com/tr-refspec.htm#cranks
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