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PostPosted: Thu Nov 07, 2019 7:57 pm 
Retro Guru
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Joined: Tue Sep 18, 2018 6:02 am
Posts: 657
Location: Hull East Yorkshire - Eng
legrandefromage wrote:

Dont call me Shirly!

I can't recall any Shirley who didn't have a stiff bottom bracket... or was that just me... :roll:


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PostPosted: Sat Nov 09, 2019 7:29 pm 
Old School Hero
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Joined: Sat Apr 23, 2016 8:46 pm
Posts: 232
Location: Chorley
This has all gone weird! I received my new Italian BB quickly from Chain Reaction. For once it was the exact item I ordered. It's too big :facepalm: It has a right hand thread on the drive side but is a mm too big. I've rechecked the original and it is English diameter but right hand threaded. It screws in to either side of the frame. What strange beast do I have?
It's rusty so I can't get any info. from the BB in question. A French BB would be right hand threaded but a different pitch thread to an English. I can't measure the TPI to see which it corresponds to. Tomorrow I'll remove another BB cup to see if it screws into the left hand, non drive side.
In the mean time I've plucked the seals out and sprayed some grease in. It's freed up a lot and I think with a bit of use it will be fine. The seals went back and will suffice for the relatively dry riding I'm likely to be doing.
I still have the option of rethreading the frame for an Italian BB in the future, if I ever need to but what I'd like to know is what the hell is this BB and why is it fitted to my bike?


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 Post subject: Re:
PostPosted: Sat Nov 09, 2019 7:40 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 9059
Location: Scotland
New Bike!!! :lol:

Don't know why anyone would want to re-thread a frame for Italian BB, I'd sooner just fit one of those BB's with a sleeve either side, the ones for frames with stripped BB threads.


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PostPosted: Sat Nov 09, 2019 7:41 pm 
King of the Skip Monkeys
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 30704
Location: Crayon-Munching-Fart-Muppet
There were some Shimano BB that screwed in 'back to front' in the early days - 1992 was around the start of it all, I remember faffing with my Claud Butler Spectre cartridge BB after wearing it out.

Pictures tell a gazzzzzilllionnnn words, soooo.....?


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PostPosted: Sat Nov 09, 2019 7:46 pm 
King of the Skip Monkeys
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 30704
Location: Crayon-Munching-Fart-Muppet
The Attack LE looks to have had a Sugino chainset, so if it is original, it may be some non Shimano make, as before, pictures please!


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 Post subject: Re:
PostPosted: Sat Nov 09, 2019 9:18 pm 
Retro Guru

Joined: Sat Apr 15, 2017 12:26 pm
Posts: 404
Location: Lost now on the country miles
Shimano's version of an Italian bottom bracket is not the same as the Italian's version of an Italian bottom bracket: the Shimano version has a wider diameter. No idea why.


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PostPosted: Sat Nov 09, 2019 9:49 pm 
Old School Hero
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Joined: Sat Apr 23, 2016 8:46 pm
Posts: 232
Location: Chorley
Mmmmm! don't know what a picture would show. It's a right hand threaded BB which appears to be English diameter. That's all I know.


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