got a pair that seem loose in the bearings, can you service them. get spare parts etc, if so where ? thanks ak

service yes,

spare parts? good luck.

I’m looking to replace mine if you are after spares

perhaps if you can strip and re build if not i will buy a new pair

I have no idea if you can.

Yes, but you need a special tool (bit like a smaller cassette removal tool) to remove the spindle assembly. After that its easy, just lots of bearings. Your lucky with the 647’s as they have an alloy collar, the cheaper ones have a plastic collar that just shatters