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Help needed STW. Shimano CS-M5100, 11-speed, 11-51t. This is on my 2021 Bizango. Wheels are Hunt XC wheels.
I've already searched the previous threads about rear cassettes loosening, however, none of the solutions offered have fixed the issue. The cassette keeps loosening. Not the lockring, the 'fixed' section of the cassette. there is no lateral play. I've had it off and on loads trying to ensure everything is straight and true. There are no additional spacers, just the ones that go between the relevant sprockets. It's torqued correctly and yet it keeps happening. Driving me mad.
So the lockring is tight and is not coming undone, but the biggest 3(?) sprockets are coming loose?
Edit - which way do the sprockets move? rotate or wiggle side to side?
@StuF - rotate. No side to side movement. So if you put the chain under tension the largest section of the cassette moves forward and backwards. (i know it's meant to usually 🤣). What this creates is an unbelievable clanking noise.
Can you work out which bit is rotating? Does it do it with another cassette?
* Sprocket on the carrier - cassette is knackered - if new, return it to shop
* carrier on the hub - splines knackered
* hub on the wheel - I'd expect this on the smaller sprockets as well - but might not if it's just torque related
I'd speak to Hunt, sounds like a tolerance thing.. Failing that a washer under the lock ring?
Photo of your freehub would be useful.
If the freehub is notched through wear then a small sprocket might not be sliding along the grooves properly and then the lockring, although tight against this smaller sprocket, isn't compressing all of the cassette
If you do need a spacer, put it between the hub and the largest sprocket. HT2 BB spacers work.
Photos below, I hope 🤔 there is some chewing of the freehub. These wheels have only done about 550 miles and none of it 'technical'.
Section of cassette that was moving is made up of 5 largest cogs which is a single carrier. The rest are all loose cogs and spacers.
HUNT said no additional spacer should be required for an 11sp cassette.
TIA
Yeah, it's possible that one of the smaller sprockets is getting hung up in a notch and not closing the gap to the next one. I'd take a file to the FH to get rid of the raised bits around the notches then re-try.
Thanks all. I'm not well versed in spannering but times are tight!!
Another QQ.. I also have an 11-46 cassette in my spares box which for 99% of my riding would be more than sufficient gear range - not many mountains in North Tyneside 🤣🤣. Would this be OK with the rest of the current gearing set up given a smaller largest cog? Again, TIA.
HUNT said no additional spacer should be required for an 11sp cassette.
Are they definitely talking about an 11 speed *MTB* cassette?
11 speed road are wider than 11 speed MTB.
11 speed MTB need a spacer if they are used on hubs that work with 11 speed road, should come with the hub.
<edit> what Horatio said.
So no spacer came with the hub. Hunt say no spacer required. Just to be clear the wheels are XC Wide mtb wheels. Other than that though I am not speaking with any authority 😂
The wheels have done 550 miles - how many miles has the cassette done?
If it was a lack of spacer there'd be lateral play, surely.
That old chestnut, the Deore cassette rivet issue? Here y'go. Easy warranty issue if that's the case.
The wheels have done 550 miles – how many miles has the cassette done?
Extra 50 miles on original wheelset.
It took 1500+km with a lot of climbing to muller mine, so might not be your issue. Your 11-46 cassette should work fine with the existing setup (assuming the chain's still ok).
Thanks again all. @montgomery I've got the chain to with that cassette, so might just give that a go and see how it goes. Cheers
Seems odd for the cassette to have play rotationally. I wonder if it’s a faulty cassette - I have heard of some deore ones doing that and getting warranty replaced.
What did it turn out to be?
@montgomery - Well, other than NOT the rivet issue haha I still have no idea. Lol. I did what @scotroutes suggested to remove the raised bits, then tried fitting the 11-46 cassette. No go. No matter how much I tried it wouldn't fit over the splines. Right sort of cassette for FH as well. So, plan B was to refit the original deore cassette. I took an inordinate amount of time to try and make sure everything was sitting correctly, torqued up OK. Seemed fine following fitting and a spin round the block. I'll re-evaluate in a couple of weeks once it's had some proper use.
Not sure if thus will work as I've no idea how you upload a video into the actual post!! Just over a week and it's moving again and causes a real clank when putting power down e.g. at the bottom of a hill following coasting. Now, it could be its meant to move on the FH like it is, but none of my other bikes do/have done that. It's almost like on the 'solid' section of the cassette the slots, where the FH splines go, are too big so it moves. The loose sprockets do not.
There is no lateral movement at all.
Interestingly, I tried fitting the 11-46 Sunrace cassette I have, previously fitted on a Shimano FH, and I can't even get that onto this FH, as though the splines are too wide, or the slots on the 'solid' section of that cassette are too narrow.
I'm flummoxed. (I'm not particularly technically minded anyway, so this has me beaten.)
That's knackered. Either something wrong with the splines on your freehub or the cassette is faulty.
If you've filed off the lumpy bits then you should have no problem fitting a new cassette. Can we see a photo of the FH post-filing?
My bet is you need a spacer between the hub and cassette
So, a development. Been chatting online with a lovely chap at Hunt wheels, and he us sending me a new freehub, and, even though he doesn't think it needs it (as specs say it shouldn't), a spacer too.
He thinks the spacer may be too thick, and tbh, even though he then phoned me to explain, I could not really work out/visualise where the spacer goes.
Should be here by Wednesday so we'll see how it goes,but a big shout out for Hunt customer service, really quite excellent.
Just noticed they're doing Black Friday already, so now I'm tempted to get set of gravel wheels after all😂
Edit: once again, thank you all for your advice and sharing of knowledge. As someone who is not in the slightest bit technically minded it's really helpful. 😁
Good luck fazzini! Let us know how you get on.
My bet is the same as tabletop2's, you need a spacer between the hub and cassette.
you need a spacer between the hub and cassette.
As I can't visualise this, is this as simple as a spacer that goes onto the freehub, before the cassette, in exactly the same way as the cassette will? Like the spacers that sit between the loose sprockets of the cassette assembly?
Also, cos I'm curious, why would a spacer before the cassette make a difference to the movement I'm getting currently? Sorry, has to be idiot-proof for me to understand 🤣
As I can’t visualise this, is this as simple as a spacer that goes onto the freehub, before the cassette, in exactly the same way as the cassette will?
Yes,
If the individuals are tight, but the larger cluster is loose, then there is a lump or notch preventing the individual sprockets preloading the larger cluster.
If all sprockets, individual and cluster are loose, then you need a spacer behind the cassette.
@fazzini I have exactly the issue you describe on my 2022 Bizango (bought new in June). I'm running the original Voodoo branded wheels so, as you have Hunt wheels that would imply that the cassette is the problem. I have the lockring tighter than I would normally expect but the issue persists. I've been running Shimano cassettes for over 30 years and never experienced it before (although, to be fair, they had a narrower range). Annoying.