I found a cracked nut on my Assioma Duo Shi so I got the kit to swap out the adapters/bearings/nut. They recommend a PTFE grease but nothing specific. I did some googling and I’m more confused now 
Any tips on which grease I should use? I have some Park Tool Polylube but don’t think that’s a PTFE grease.
Thank you!
Super lube, which can be found at harbor freight if you have one local has ptfe
Thank you! Have one right down the road and it looks to be in stock.
FYI, PTFE (brand name Teflon) is a PFAS (“forever” chemical). It doesn’t breakdown basically at all, just can get ground into particles. PFAS have contaminated the world including humans and basically all mammals.
So not ideal to use from that aspect. Unfortunately it’s a really great engineering material, which is why it’s so broadly used. I assume you won’t be eating it, but every time someone buys some that increases how much more gets made by a supplier to replenish supply (it’s not naturally occurring).
There’s many good lubricants out there. Pedals aren’t a critical application that requires PTFE. The EU is in the process of banning PFAS but just last month acknowledged there’s many industries where the conditions are too extreme and there aren’t suitable alternatives. Bicycles aren’t one of them though.
I generally fuel with drink mix, maple syrup, and fig bars 
I appreciate your concerns here but what’s the alternative? These pedals aren’t cheap and I want to follow the manufacturer’s directions to get as much life out of them as possible.
This is a fairly benign application. Any decent wheel/bearing/bicycle grease should do. What’s more important is to replenish the grease if it gets washed out (and avoid washing it out).
But I’m a mechanical engineer. I know these things and most consumers of course do not. You’re just trying to do what the manufacturer recommends. And honestly it’s a pretty small drop in the ocean.
Hopefully over the next decade manufacturers try to reduce / eliminate their PFAS usage, especially the food and cosmetics industries!
I’ll write Assioma and ask them to recommend a non-PFAS grease instead.
I sent Favero support the following email. Hopefully they’ll recommend something else.
In your YouTube video for servicing the Assioma pedals you recommend to use PTFE grease. PTFE is a PFAS, also known as a forever chemical. PFAS are dangerous for the environment and for humans. Because of this the EU (specially the ECHA) is in the process of banning the use of these chemicals. Because of the pending PFAS ban I’m sure that your engineering team has already been investigating alternatives. Can your engineers please recommend a non-PFAS grease for use in your bearings? I do not wish to buy PTFE grease when I believe there are suitable alternatives.
Learned something new today. Thanks so much!!
Pretty sure I’ve used the generic Park Tool grease and lithium grease over the years changing bearings on my 2018 Assiomas. Have never had an issue with either, change the bearings every couple of years.
From what I have read on weight weenies, any high quality grease will work just fine. It’s lubrication ( friction reduction) that they are wanting by specifying Teflon as an additive. You might want to play with the viscosity of the grease. Some can be very thick and cause the pedals to be a little stiff .
Here’s the response from Favero
Thank you for your kind request and the useful consideration.
Answering your question, I confirm you can use some common lithium grease for any future greasing process. For example, you could evaluate using Park Tool HPG-1 High-Performance Grease or Vartool Lithium grease (you can find the second one at the following link: https://www.vartools.uk/grease-c102x4151060).
@FrankTuna see above post
I’ve used this on my Favero DUOs for years…. because I already owned a tube…. not because of PFAS.
