Bicycle Mechanics - Un 71 Sealed Bottom Bracket with Phil Wood Cups in a Peugeot Frame?

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Revolutions

07-28-06, 02:42 PM

I know that it is possible to use a UN 72 Sealed Cartridge Bottom Bracket assembly with Phil Wood French Threaded Cups in a French threaded bottom bracket shell (An old Peugeot racing frame, in this case). Is it possible to use a UN 71 bottom bracket instead of a UN72? Are there any spec differences between the two cartridge assemblies that would keep the UN 71 from working in place of the UN 72?

Thanks for your help,
Anthony Siracusa

2_i

07-29-06, 09:30 AM

In my recollection, the left-side Shimano replacement cups had no particular specification as being for one or other Shimano BB. Thus, I would not expect the fit to be different between different (taper) Shimano BBs.