Thread: BB Shell has holes from cables
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Old 10-21-13 | 09:27 AM
  #7  
FBinNY
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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Originally Posted by Looigi
Wet road grit can serve as a nice abrasive paste between the cables and guide or BB. You'd likely make it through many cables before making it through the BB, but IMO given enough cables, time and shifting, it would be inevitable.
Even if you used coarse lapping compound, it would take eons to saw through a BB shell. If wear could cut through steel that way, we'd be seeing hundreds of posts about the screw on guides wearing out or falling apart.

Back in 1968 I went to BB routing for the ft derailleur. It took over 10,000 miles to cut through the paint.
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