Platique - C4 or fertilizer and Diesel ?


Nicest BB I had was a square taper the bearing cartridge was behind Shaft packing in each Cup

so the sealed bearings were behind another set of seals .

But this was the German Sachs , they were Bought out By Sram , and the company No Longer exists .

WTB grease Guard is what I Fit as a Replacement for the 1st UN xx that needed replacement

Sun Tour made them, theyre Gone Too.

Actually the externals use smaller bearings , but there are More of them surrounding the big 24mm tube spindle.