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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 01-22-09, 11:23 PM   #1
van09
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Got a few questions on the size of BB

i am riding a 53cm bianchi pista .i got a shimano 7710 crank arm,but i hv no idea with the size of BB that i should use.
i hope that u guys can help me,i hv done some resarch from the net,they said to use a 68x109.5 but my frame is a ltatian frame,so should i use 70x109.5 with EnglishThread?

thanks!!!!!!!
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Old 01-22-09, 11:27 PM   #2
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R U thinking that Pista is Italian?
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Old 01-22-09, 11:51 PM   #3
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English threads, Chinese frame

check this
Is the Bottom Bracket on a Bianchi Pista threaded English or Italian?
and this
Bianchi Pista 08 Bottom Bracket

Good you got a different crank than that POS that comes with a Pista.

If you have the real deal Dura Ace crank you know you need an octalink BB and the size you mention is correct.
It does not have to be the DA track BB, you can use the correct BB that is sold as a road BB, that's what I have.
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Old 01-22-09, 11:51 PM   #4
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http://www.jensonusa.com/store/produ...m+Bracket.aspx
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Old 01-23-09, 12:12 AM   #5
van09
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that means I am supposed to get a 68x109.5 BB with English Thread
and that will suitable for my bike to achieve a 42mm chainline RIGHT?
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Old 01-23-09, 12:39 AM   #6
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Depends on your cog but it should be good for the chainline. There are about a million threds about 42mm chain line. You can find those.
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