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Im repairing a friends bike and changing the crank. I have removed it and want to find a replacement

The removed item is Model: BB-06-PSPL - 113/68 Im wondering if there is a replacement Shimano model? or an upgraded part available as the bike is quite old.?

His bike is running Shimano Tiagra triple crank 9 speed. I am wondering if I could change the crank over to shimano aswell or would this not be possible due to the fittings in the crank housing.?

Thanks for you time in advanced

RD

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2 Answers 2

up vote 3 down vote accepted

The item you removed (BB-06-PSPL - 113/68) is the bottom bracket. The 113/68 means that it s 113mm spindle length and 68mm bottom bracket length this means that it is a standard size and will be easily replaced. The PSPL means that it has a Powerspline interface with the cranks, this is a Truvativ/ SRAM proprietry system so if you wish to keep the cranks you are using you would need a replacement Truvativ cartridge.

If you are willing to change the crankset as well you are not limited in any way as long as:

  • The bottom bracket is 68mm and English thread and has the same interface as your new crankset, or you could choose and external bearing set up.
  • The crankset is built for the right drive train, if you have a 9 speed rear derailleur you need a 9 speed crankset as chain widths are different.
  • You can achieve the same chain line as your current set up with a new crankset through selecting the right spindle length. (this may take a few internet searches for Shimano this is available in the Tech Docs for each crankset).
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Correct me if I'm wrong, but if you're replacing the bottom bracket and the crankset, you should be able to use whichever crankset you want provided you buy a bottom bracket with the correct spindle length to get the correct chain line. –  Kibbee Feb 27 at 19:34
    
Yes sorry changed my track of thought halfway through. –  DWGKNZ Feb 27 at 19:57
    
Thanks for your replies. I think we will keep the same crank set and just replace the bottom bracket. I have seen halford have the exact replacement part but the also have halfords.com/webapp/wcs/stores/servlet/…. Would this fit aswell without changing the crankset? –  user10432 Feb 27 at 20:01
    
@user10432 - The link is for an ISIS bottom bracket which has a different interface to Powerspline and not compatible. You're likely to get a better deal at chainreactioncycles.com than Halfords. –  DWGKNZ Feb 27 at 21:41

If you want to change the chainset, you will need to change the bottom bracket. You can change it to a square taper Shimano bottom bracket or something more advanced like a external bottom bracket. (113/68) 113mm is the length and 68 is the width of the shell.

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