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Do you usually grease the BB shell, which is carbon, when installing a push fit BB?
I was having very slight creaking problems, not sure if the grease will cause more of an issue over a longer term.
Shirely my dear, you need to use carbon paste, as 'some' carbon swells when exposed to grease IIRC.
I don't think carbon paste assembly paste is what you want - it's designed to increase friction so that you don't need to over-torque handlebars/controls etc. to get them to stay put.
I didn't think about it until after I'd installed the BB on mine. I put a very thin smear of grease on mine when I assembled it (Pivot Mach 5.7C) and it didn't seem to have caused any problems when I replaced it a year later. No creaking in that time either.
Thanks, ive tried it without anything, see how it goes!!
Use something, it's only some types of grease and assembly paste acts as a barrier between the two materials and prevents corrosion even if the friction property isn't needed.
On my niner I used Carbofix spray.
It's a tight fit so I would probably not use carbon grip paste due to the particle size. I would go with something like finishline grease if you have some (white stuff with PTFE) or similar. Most big brand bike lubes will say if its known to be carbon safe. Tbh epoxy is very chemical resistant but there can be other polymers in there.
Trek tell u to use Rock n Roll Super Coat grease on the carbon bearing interfaces. Wouldn't use nowt.
When I spoke to Spec they recomended any NON-Lithium grease, such as the Park Polylube 1000.