What do all the numbers mean then? Some are EN, some are ES etc.
Bike Forum
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Shimano BB numbering
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Posted 1 year ago #
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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 1 year ago # -
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 levelPosted 1 year ago # -
UN is tapered and ES (Eight Spline) is Octalink. The higher the number the higher the quality.
Posted 1 year ago #
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