[Closed] Italian Bottom Brackets - What's the Deal With 'Em

different BB shell threads that is the main difference

Odd sizes.

So no great problem so long as tightened correctly??

They rust faster but look great.
IGMC

the laws of physics work differently in Italy, therefore the threads go in different directions

Right-hand thread both sides

Both RH threads and 70mm BB width. Functionally no real difference.

Italian BB's have had a reputation for unscrewing in the past, I don't know how well deserved that is and this thread may be of use;

http://www.bikeforums.net/archive/index.php/t-56411.html

I wouldn't be put off buying a frame you liked because of the bb thread.

http://pardo.net/bike/pic/mobi/b.bottom-bracket-standards.html

I had a training bike with one for a couple of years and had no problems with it. Sold that bike on to a mate of my Dad's and I've heard nothing untoward about it...despite that bike being used for the training for and for the actual riding of Land's End to John o' Groats.

@macavity - that MOBI site is really interesting, cheers for that

Thanks guys - a great help - I guess just get it tight & all will be fine. Maybe a bit of loctite but not until i've tried without