Shimano Bottom Bracket Length

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03-03-18 | 08:55 AM

cpsqlrwn

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OldSchool

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From: Chesapeake, VA

Shimano Bottom Bracket Length

I don't know much about Shimano specs, having used Campy primarily. I bought a nice Battaglin with triple Dura Ace components and I am wanting to convert to a double. Have bought most of what I need and I bought a UN55 70 X 115 square taper Italian BB. It's been awhile but I think I got the length spec off the late great Sheldon Brown's website.

This length would be a triple length for a Campy so I am having some second thoughts about whether it is wrong for a Shimano double also. Can someone please straighten me out on this, the preferred length for a Shimano double Italian bottom bracket? I am using a 6400 era crank, downtube shifters and rear derailleur, 8 speed. Thank you for any assistance.

03-03-18 | 09:04 AM

Bianchigirll

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Does this answer your question? VeloBase.com - Component: Shimano BB-6400, 600 Ultegra

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03-03-18 | 09:52 AM

cpsqlrwn

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OldSchool

Joined: Jul 2007

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From: Chesapeake, VA

Thank you Bianchigirll

03-03-18 | 07:07 PM

rccardr

aka: Dr. Cannondale

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Depending on how widely spaced your chainstays are on the BB shell and if they are dimpled for chainring clearance, somewhere between a 112 and a 116, regardless of whether it's Italian or BSA threading.

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