Join Date: Mar 2009
Location: Sacramento, CA
Bikes: 1986 Schwinn Tempo
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Dura-ace Square Taper Bottom Bracket
I recently acquired a Dura-Ace 7400 series bottom bracket 68x112. This is the adjustable, square taper type. I would like to use this BB as a replacement for the square taper Shimano 68x113 UN52 that is on my Trek 1200. I'm currently using an older RX-100 crank set.
The Dura-Ace BB is stamped with "NJS" on one of the cups. I researched Sheldon' site and understand that "NJS" is a manufacturing standard but other than that should there be any issues regarding taper of the axle? Sheldon seems to indicate NO but I just wanted to double check.
In short, does shimano = shimano when it comes to parts interchangeability, i.e. does the Dura-Ace axle and the UN52 axle share the same tapers?
As a side note, I'm not worried about the 1mm difference in axle width; I'll have enough clearance on the frame to "tune" that out.