Lockring spacer

[mynydd]

during the last couple of rides my bike has started rattling annoyingly on rougher roads. I had a good look today and discovered that the cassette (105 11speed) was wobbling a bit. I stripped it down, cleaned it and reassembled it and it's still wobbly. The only thing I can think of is the lockring spacer as that looked a bit chewed up. Does this make sense? And if so any idea where I can get one from? I'm not having much luck looking for one.
Thanks in advance

 

[Tojo]

I would look at the bearings in the freehub and wheel hub, had to replace the two sealed bearings in my mates Zonda freehub two weeks ago, same problem...

 

[mynydd]

Thanks, the beatings seem fine. The cassette definitely isn't tight enough on the hub, you can see a tiny amount of movement between them.

 

[Tojo]

Have you got the correct spacer on the freehub behind the cassette.....?

 

[Roadrider48]

I don't think you need a spacer for an 11 speed cassette. I never have.
Maybe your freehub body is dodgy or something.

 

[mynydd]

There wasn't one there when I took it off (bought the bike new just over a year ago)
It does feel as if there should be one tbh, any idea what type, and where I could get something suitable?
Though it has been fine until the last couple of weeks......

 

[mynydd]

Actually, The cassette doesn't feel as tight on my freehub as the cassette on my other bike does....

 

[Roadrider48]

I have five 11 speed bikes and none of them need a spacer behind the cassette. Is the locking fully tightened?

 

[Roadrider48]

Or even, has the freehub body somehow come loose with time?

 

[mynydd]

The free hub seems fine. But there is definite movement between it and the cassette I've tightened it as hard as I possibly can but it's making no difference, which is why I suspected the lockring spacer, as it seemed a bit chewed...

 

[Roadrider48]

What about the lockring? The one at the front that you tighten to secure the cassette?

 

[mynydd]

I'm not sure what you mean? It seems fine

 

[Roadrider48]

The only other thing I can think of is that the freehub body is chewed up and the cassette is slipping on that.
If not, somebody more knowledgable than me will be along I'm sure.

 

[Roadrider48]

I'm not sure what you mean? It seems fine

The threaded disc shaped object that screws on top of the cassette once you have put the cassette onto the freehub body.
You then need to tighten it with a specially shaped tool that fits inside it to allow you to tighten it.
Sorry, I am better at doing it than explaining.

 

[mynydd]

Thanks for your help. Yes, I know what the lockring is. I've taken the cassette off several times today trying to work out what is wrong, and it's begining to annoy me slightly now