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BB for Sugino Mighty Competition

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BB for Sugino Mighty Competition

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Old 12-17-18, 10:03 AM
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flx100
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BB for Sugino Mighty Competition

I have a 70's Sugino Mighty Competition crankset currently mounted on a Campy Pista BB - 111mm. The chainline with this setup is around 44.5mm, which is 2.5 mm too for out. - I have Dura Ace hubs, which have standard 42mm chainline.


Questions:


1. If i want to be anal about it (which i will) i suppose i should run a 107mm ISO spindle length with the crankset. Does anyone know of good quality English threaded BB with 107mm ISO spindle?


2. Has anyone run this crankset on a Sugino 75 BB, (109.5mm ISO), and what chainline did you get? (i'd rather not use this, as it has loose ball bearings)


Any alternatives with sealed bearings?


Thanks!
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Old 12-17-18, 10:49 AM
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https://www.retro-gression.com/collections/bottom-brackets/products/sugino-75-cartridge-bottom-bracket

specs say the spindle is 109.Should be just right but I would call scrod
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Old 12-17-18, 12:01 PM
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Originally Posted by hay View Post


specs say the spindle is 109.Should be just right but I would call scrod
Thank you - however it says on Sugino's website and in the installation pdf that it's a special taper, only for Sugino75 cranks. - Not compatible with either ISO or JIS.

can't post link as i don't have enough posts, but it's here: suginoltd dot co dot jp/us/products/bb/pdf/MA-BB_CBB-SG75(JP_EN)20160824.pdf
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Old 12-18-18, 08:12 PM
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Originally Posted by flx100 View Post
Thank you - however it says on Sugino's website and in the installation pdf that it's a special taper, only for Sugino75 cranks. - Not compatible with either ISO or JIS.

can't post link as i don't have enough posts, but it's here: suginoltd dot co dot jp/us/products/bb/pdf/MA-BB_CBB-SG75(JP_EN)20160824.pdf
Stick around and post more and you will post all the links!

The Sugino 75 cranks and BBs are ISO compatible. I am sure they say that to sell more of their own BBs but plenty of people have used something like a Phil Wood ISO taper in the proper length.
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Old 12-20-18, 12:31 PM
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Originally Posted by veganbikes View Post
Stick around and post more and you will post all the links!

The Sugino 75 cranks and BBs are ISO compatible. I am sure they say that to sell more of their own BBs but plenty of people have used something like a Phil Wood ISO taper in the proper length.


Thanks - retro gression had a NOS MICHE Primato 107mm ISO so i ordered that - 107 ISO should technically be the correct length to achieve the perfect chainline. I will post the result after i install.
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Old 12-20-18, 12:55 PM
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Also, I asked Track Supermarket about the Sugino75 with cartridge bearings - they say that although the specs say 109mm, it is in fact 111mm.
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Old 12-20-18, 10:59 PM
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Originally Posted by flx100 View Post
Thanks - retro gression had a NOS MICHE Primato 107mm ISO so i ordered that - 107 ISO should technically be the correct length to achieve the perfect chainline. I will post the result after i install.
Originally Posted by flx100 View Post
Also, I asked Track Supermarket about the Sugino75 with cartridge bearings - they say that although the specs say 109mm, it is in fact 111mm.
I don't worry about chainline, if the chain stays on and is relatively quiet, I am happy. Granted I have generally just gone with manufacturer recommendations or the closest thing to that or just go with a Hollowtech II style crank and not worry 'bout it.

I guess the Sealed 75 BB is a bit longer for bikes that aren't pure track bikes.
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Old 12-30-18, 03:01 PM
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Originally Posted by flx100 View Post
Thanks - retro gression had a NOS MICHE Primato 107mm ISO so i ordered that - 107 ISO should technically be the correct length to achieve the perfect chainline. I will post the result after i install.
That worked. Perfect 42mm chain line with a 107mm ISO BB.
Thanks for chiming in.
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