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Italian BB Threading help!(3 posts)

Italian BB Threading help!tmguy
Jun 3, 2003 6:56 AM
To remove is it lefty loosey on both drive and non-drive? I know English is reverse thread on the non-drive. As I recall Italian is not reverse thread on the drive side,but instead standard.

Thank you for the help (and preventing me from stripping something).
Italian = normalDougSloan
Jun 3, 2003 7:05 AM
Italian threaded bb's are normal, right-tighty-lefty-loosey both sides.

more info at Park siteDougSloan
Jun 3, 2003 7:10 AM

THREADING NOTE: Most modern bikes use an ISO thread standard for the bottom bracket. The left side thread is a right-hand direction thread, which tightens clockwise and removes counter-clockwise. This standard is also called English or BSC. The right side thread is left-hand thread, which tightens counter-clockwise and remove clockwise. There are some exceptions to the ISO. Bikes made in Italy may have both sides right hand thread (look for 36 x 24 tpi marking on the outside of the flange.) Older bikes from France may have right hand threads on both sides. Below is an image of the common ISO threaded cups. Note the threads of the left-threaded (drive side) cup slope upward to the left. Threads of the right-threaded (non-drive) cup slope upward to the right.