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now in philadelphia
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798 Posts
Discussion Starter · #1 ·
Background: I had some difficulty removing a GXP crankset when the crank spindle caught on the NDS cups during removal. I finessed it out with a rubber mallet in the end.

Now, as I try to install this same crankset on another bike, I am having trouble again. The cups are installed but when I slide the spindle through the BB shell, the beveled end of the spindle seems to be catching on the NDS BB cup's bearing race. I tried the rubber mallet but I didn't want to force it and potentially break something.

Does anyone have any suggestions on a course of action?

thanks.
 

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Carbon Fiber = Explode!
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3,955 Posts
GXP BBs have a Right cup ability most people don't know about.

The cup moves with the crank to keep the bearings orthogonal to the spindle plane.

Wiggle it in.
 

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now in philadelphia
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798 Posts
Discussion Starter · #3 ·
Orthogonal - good word.

I tried the wiggling but as I mentioned, it took some force with the mallet to remove it in the first place. Is the bearing race supposed to be so tight against the spindle?
 

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Carbon Fiber = Explode!
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3,955 Posts
My drive side is flush with the cup. My left side, not so much. No play whatsoever.

Try removing and reinstalling the BB, maybe you threaded diagonally?
 
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