What are the pros and cons of each? With both top hat style and heavy duty mounts?
I usually use polymer but have now got some du metal bushes with no coating (have seen metal ones with a red inner coating) any good or should I ditch them?
Also anyone know where I can get some polymer ones cheap?

Ebay 2 for £3.5 delivered

"DU metal"
Depleted Uranium?
It burns quite violently

Depleted Uranium?

Dunno what DU stands for (doubt it's anything to do with uranium 🙂 ) but thats what they're called

anyone in this morning that knows about this stuff?

DU inner is lead, possibly sintered, with teflon. I think the plastic ones lasted longer, though not as much longer as they were expensiver, but I was willing to pay a premium for longer service intervals

i've found the plastic hulahoops last longer and are easier to get in with the BETD tool

DU inner is lead, possibly sintered, with teflon.

The one in the pic and ones I've removed before have red inner coating. These that I have just bought have no coating at all – still OK to use do you think or bin them?
TRH I have been using polymer ones too but I go these quite cheap

These that I have just bought have no coating at all

all the ones I used just looked metallic on the inside, not red

DU = Dry Unlubricated , tend to be pretty cheap

Polymer ones last a bit longer and tend to be easier to replace

I'd ditch any without the red phosphor bronze stuff inside.
Simon – i think you might be using DX bearings…?

From what I've gleamed over the years, DU = dry unlubricated while DX = dry needs grease. They're both dry bearings coz they don't need continual lubing like in yer car'n'sh!t.

could be wrong

DU = Dry Unlubricated

unlubricated because the coating is self lubricating and grease should not be used.

Simon – i think you might be using DX bearings…?

no, definitely DU! Lead is a different colour to bronze.

It ain't lead, I think the DX description is corrrect it looks like a grey surface – its probably a graphite bonded compound.

the ones I have are 08du08 as recommended on another thread here a while back, sounds like there maybe different types of DU as TFtuned call them du and they have a red coating.

they will be fine the worst that can happen is they wear quicker as they are designed to wear and were dirt cheap does this matter. Cant see how it will do any damage to your shock. Willing to use my shock etc as a test if you are still worried now MTFU and use them FFS 😉