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Ordered a UN-72 BB, but inside the box ain't I ordered!(11 posts)

Ordered a UN-72 BB, but inside the box ain't I ordered!trimble
Jan 7, 2003 7:35 PM
Is there something going on with Shimano and the older style (square tapered) bottom brackets? I ordered one from Performance. The box's label says it's a UN-72, but what I was actually got was a UN-52 (Tiagra) bottom bracket. I called Performance to find out what the heck is going on. I'm more than a little peeved. I don't think the lady who took my call knows what a bottom bracket is. I sent it back and in the meantime they sent me another BB. It arrived today and you guessed it - another UN-52.

Does anyone know of a vendor who is selling actual UN-72's (Italian thread)? The major catalog places (Excel, Colorado Cyclist and Supergo) don't carry it any longer.
Jan 7, 2003 8:10 PM
You could try a nice new Campy bb or an aftermarket type, phil etc.

You local shop might have one hidding from a few years ago too.
Jan 8, 2003 8:04 PM
campy bb on a shimano crank, eh?...i hope you're speaking from experience rather than trying to pour gas on an ever burning fire.

aren't campy bb's of shorter spindle length than shimano?...if i recall correctly, the two brands aren't compatible.
1/2 right,TJeanloz
Jan 9, 2003 5:38 AM
Campy spindle lengths could be the same as Shimano (depending on the bb), the difference is in the length of the taper, which effects the pitch in a round-about way. This difference is enough to make the two not compatible with each other.
re: Ordered a UN-72 BB, but inside the box ain't I ordered!MR_GRUMPY
Jan 7, 2003 8:11 PM
Was the box marked UN-52 or Un-72 ? If the box said 72 but contained a 52, the fault is Shimano's. If the box said 52, some dummy at Performance put the 52's in the 72's bin. I really doubt if the stock pickers examine what they pick. They go to the bin and pick whatever is in there. Look on the bright side, at least you got a bottom bracket.
Finite life of Scandium tubed framesGripfer
Jan 7, 2003 9:38 PM
Anybody know about Scandium "life"? Are we talking fatigue life here or calendar life? As in I best get out to the shop and build up that Mercyx Team SC that's sitting in my closet before it goes bad!!
Finite life of Scandium tubed framesThe Human G-Nome
Jan 8, 2003 4:29 PM
it's not going to "rot", if that's what you're asking. no rush.
re: Ordered a UN-72 BB, but inside the box ain't I ordered!Juanmoretime
Jan 8, 2003 2:35 AM was closing them out recently, you may want to check with them before they go because they are going to get harder and harder to get. I use one in my mountain bike, they are light enough yet don't creak like some of the stupid light ones do.
re: Yeah...........Rusty Coggs
Jan 8, 2003 5:26 AM
The ones I got from Nashbar were really UN-72.
aren't they just making way for un-73's?rufus
Jan 8, 2003 12:32 PM
i believe there is now a un-53 bottom bracket, that's replacing the 52, and i would assume the same for the un-72.
UN-52 is not Tiagra. It's 105, or Deore LXTrek Racer X
Jan 10, 2003 1:48 PM
Also, UN-72 is no smoother of a system that UN-72. The only difference is that UN-72 is a few grams lighter. (30 grams or so.)

Go with Campy Record for Italian thread.