Truvativ GXP BB???? - problem solved

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Installed new Truvativ GXP BB on my <?: prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />MTB.  My first time trying to do this.  Followed instructions, right torque, grease where required.   After installation the crank felt very stiff.  I removed one spacer, no improvement (Old GXP BB had two spacer, no problem).  Decided to leave as is and see if there is an improvement after cycling for about 200 km.  No luck.   Also thought that I over greased it, if that is possible.

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Remove crank and BB.  Found out that drive side bearing does not rotate freely in the external cup (could not turn by hand).   Remove bearing, bearing rotating freely when remove from cup.  Realised that the cup could be faulty (not right size).  Decide to use the old cup with the new bearing.  Problem solved. Crank spin like a dream.

 

So it seems internal diameter of cup to small and is ?squeezing? the bearing, preventing it from tuning freely.

 

Glad I could solve the problem