SHIMANO XTR Italian Thread UN91 107mm new BIN £13

But if you recycle cups from another one that has English threads the spindle and guts are the same!!!! Only the cup sizes made the shell width different on these BB's so if you have English cups from a 68 or 73mm BB you can use them with the spindle and body of this BB. So it's really a great bargain for anybody that's replacing a current BB.
Dyna Ti are you sure you want to sell it now???
 
It's a tight tolerance that's for sure but it will come off. Lube it first.....Thread it in to you bottom bracket put a block of wood on the right end of the spindle and tap lightly, rapidly until the body and spindle slide out....then remove the cup.
Lightly is the key here don't want to damage or tear out any BB threads.
 
gm1230126":197vlwqs said:
Dyna Ti are you sure you want to sell it now???
Click to expand...

I'm not the one selling,and the ebay shop has 'more than ten'

My bb shell is threaded the wrong way[factory fu** up]so instead of it going clockwise it goes anti-clockwise on the drive side,and vise versa on the non drive side
Basically it means i have to put my BB's in backwards,so im not sure these would fit at all
Just making y-all aware :D
 
dyna-ti":2qpecym6 said:
gm1230126":2qpecym6 said:
Dyna Ti are you sure you want to sell it now???
Click to expand...

I'm not the one selling,and the ebay shop has 'more than ten'

My bb shell is threaded the wrong way[factory fu** up]so instead of it going clockwise it goes anti-clockwise on the drive side,and vise versa on the non drive side
Basically it means i have to put my BB's in backwards,so im not sure these would fit at all
Just making y-all aware :D
Click to expand...

italian bb are threaded the reverse way of english , so an italian bb would work on your frame , BUT they also have a bigger diameter so it is a no .
 
The cups are designed to come off the BB body(see pic). Compare the BB shell and spindle out of an BB-UN90/1 Italian BB with one from an English UN-BB90/1 BB.... the only thing that's different is the cups. Yes the cup diameter and threading is different but the difference is in the cups not the body and spindle of the BB. look at the picture below....think that body with spindle is the same...what's different is the size and threading of the cups....Light bulb's glowing yet?
What it means is you can use your old english BB cups with the body of this Italian BB and throw the Italian cups away.
 

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It had already twigged since you had posted it,
Makes sense though, cups are cheap to make and mass produce the main part.
 
- I warmed up my 'Italian ' UN91 before giving it the mallet treatment - the fixed cup had a spot of locktite type stuff holding it on.

hot water or waft over a gas stove did it for me.
 
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