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Shimano BB numberin...
 

[Closed] Shimano BB numbering

 tron
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[#1429942]

What do all the numbers mean then? Some are EN, some are ES etc.


 
Posted : 20/03/2010 3:58 pm
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Letters are used to denote axle system eg octalink or square taper, numbers denote groupset hierarchy eg deore or slx.


 
Posted : 20/03/2010 7:23 pm
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N is usually Square taper, S for Octalink

Numbers wise 3 for Alivio level. 5 Deore, 6 lx/SLX?, 7 XT, 8 Saint?, 9 XTR

So ES71 68/113
means the frame width is 68, axle length is 113 Octalink XT level


 
Posted : 20/03/2010 7:27 pm
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UN is tapered and ES (Eight Spline) is Octalink. The higher the number the higher the quality.


 
Posted : 20/03/2010 8:47 pm