My last mot had an advisory for the four rose joints on the zcars rear suspension. Ideally I’d prefer to take apart and simply replace immediately. Does anyone know the specs of the rose joints to reorder?

Don't know the specs but I recently bought a load of rose joints from McGills for my 7 and was impressed by the price/quality/service so I'd recommend them.

Cheers, will give them a look
I can always do the obvious and remove and check with gauges. I just prefer to simply start and finish with waiting on postage

McGill XMR range

Or if you're feeling super spendy their aircraft spec ones

So far czars have come back to me to say 5/8” in the xm range
Just checking they mean the same size on both ends before I order.

Now you’ve shown me the better aircraft Teflon version, I’ll probably buy them now

Just had answers from zcars for the replacement rose joints for future reference.
They are 5/8” UNF RH thread with a 1/2” bore. The part number for Mcgill Motorsport is XMR8-10.

On my spire I run a combination of the XM ones and the aircraft. Wishbone inner mounts to chassis I use the XM and they're fine but the aircraft ones on my top outer joints because they get a fair bit of abuse and I was wearing the XM ones out for fun, but the Zcars swinging arms the XM ought to be fine all round, different loadings to be fair.