[Phreaddy]

My wife's '92 Stumpjumper had a loose bottom bracket. I told my LBS that if they couldn't fix it, to replace it with UN72, or something equivalent. Whatever they used, the spindles are silver-colored -- aren't UN-72s black? And its threads are sticking out slightly on the left side. Would this indicate that they used the wrong length? I really don't want to take it apart myself to doublecheck, but I don't want to confront them without more knowledge.

Thanks all!

 

[oldfart]

I think you're right about UN72 being black. The older squre XTR's were silver and UN-52s are too. Its normal for a few threads to be showing on the left side. If its shifting the same assume they used the same length spindle or at least one close enough.

 

[Brian HCM#1]

Originally posted by oldfart
I think you're right about UN72 being black. The older squre XTR's were silver and UN-52s are too. Its normal for a few threads to be showing on the left side. If its shifting the same assume they used the same length spindle or at least one close enough.

Nope, the UN-72 spindle is silver.

 

[oldfart]

Oops didn't read spindle. Yeah they are silver. Don't know which shimano square bb's have black spindles.

 

[Brian HCM#1]

Originally posted by oldfart
Oops didn't read spindle. Yeah they are silver. Don't know which shimano square bb's have black spindles.

I think its their lower end spindles.