BB Lockring removal: Which way to loosen?
04-10-16 | 06:48 PM
#2
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Italian should say "36x24". Anyway, all threaded bottom brackets, English, Italian, French and Swiss, have the right hand threads for the non-drive side cup so the lockring loosens by turning it counterclockwise.
04-10-16 | 06:50 PM
#3
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Thanks.....you are right the lockring is non drive side.
04-10-16 | 06:53 PM
#4
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If it is Italian, you'd turn the drive-side cup counter-clockwise to loosen it. Same with French (35 mm x 1 mm thread pitch). Others -- British/ISO, Raleigh, Swiss -- would be clockwise to loosen.
04-10-16 | 07:06 PM
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I'll just play the devils advocate- A one piece crank (what we called an Ashtabula back in the day) has it's LH (non drive side) threads being left hand ones. But as these are on the crank arm and not the shell it makes sense. Andy.
04-10-16 | 09:04 PM
#6
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Can you double-check those numbers? I don't know of any 38 mm standards, but Italian would be 36 mm x 24 tpi. It would also be 70 mm across the bottom bracket shell instead of the 68 mm shell width used by most other threaded bottom bracket types. If you were to post the make of the frame and approximate age, we could also take a guess as to what BB standard it might use.
If it is Italian, you'd turn the drive-side cup counter-clockwise to loosen it. Same with French (35 mm x 1 mm thread pitch). Others -- British/ISO, Raleigh, Swiss -- would be clockwise to loosen.
If it is Italian, you'd turn the drive-side cup counter-clockwise to loosen it. Same with French (35 mm x 1 mm thread pitch). Others -- British/ISO, Raleigh, Swiss -- would be clockwise to loosen.
04-10-16 | 09:46 PM
#7
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36x24? Then Italian it is.
...and Bianchi, being Italian, made plenty of bikes with Italian threaded bottom brackets, so that makes sense. (There are also plenty of Asian-built Bianchi frames with English threaded bottom brackets, but those wouldn't be 36x24.)
...and Bianchi, being Italian, made plenty of bikes with Italian threaded bottom brackets, so that makes sense. (There are also plenty of Asian-built Bianchi frames with English threaded bottom brackets, but those wouldn't be 36x24.)
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hheilig
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