lyslexic Posted June 25, 2012 Share The cassette on my new bike "wobbles". When I say wobble I mean it moves around and it's not straight. I asked the LBS about this and was told that the plastic bit behind the cassette was making it look like the cassette is wobbling. I removed the plastic and it still wobbles Is this Normal? Is the wheel not true or is the wheel bent? Link to comment Share on other sites More sharing options...
gummibear Posted June 25, 2012 Share The cassette on my new bike "wobbles". When I say wobble I mean it moves around and it's not straight. I asked the LBS about this and was told that the plastic bit behind the cassette was making it look like the cassette is wobbling. I removed the plastic and it still wobbles Is this Normal? Is the wheel not true or is the wheel bent? No it's not normal for it to wobble.Take it to another bike shop to have it checked.How did you remove the plastic disk? Link to comment Share on other sites More sharing options...
RooiWillie Posted June 25, 2012 Share When you freewheel or when you pedal? Link to comment Share on other sites More sharing options...
Tumbleweed Posted June 25, 2012 Share Is there play on the cassette if you move it by hand? Link to comment Share on other sites More sharing options...
FrankTank Posted June 25, 2012 Share You need an extra spacer between the cassette (largest sprocket) and wheel hub. Link to comment Share on other sites More sharing options...
Pieterg Posted June 25, 2012 Share Not good get a second opinion Link to comment Share on other sites More sharing options...
Eugene Posted June 25, 2012 Share My daughter's 20Inch bike does exactly the same thing. I just took it to be a cheap bike. Besides, after 3 years, no issues. Link to comment Share on other sites More sharing options...
petatodd Posted June 25, 2012 Share Most likely the cassette is not properly tightened onto the freehub body with the fixing ring or the bearings are badly fitted. Either way your bike shop should fix it. Link to comment Share on other sites More sharing options...
Johan Bornman Posted June 25, 2012 Share It is perfectly normal. Go for a ride. TheV, ThePubSA and Java001 3 Link to comment Share on other sites More sharing options...
Ryan Posted June 25, 2012 Share It is perfectly normal. Go for a ride. How is it normal? What causes it to happen? Link to comment Share on other sites More sharing options...
Johan Bornman Posted June 25, 2012 Share How is it normal? What causes it to happen? A very large percentage of hubs do this. The freehub body is not exactly centred on the axle and causes it to do a little waltz that is clearly visible when the bike is freewheeling in the stand. It does exactly that when the freewheel is engaged too, but the sprocket movement mesmerizes you so that you can't see it. It is more prevalent on freewheels with hardened steel bodies such as Shimano, than on aluminium-bodied freewheels. This is 'cause the steel is tempered after it was machined and slightly distorted in the process. Go for a ride. Seiously. Link to comment Share on other sites More sharing options...
Ryan Posted June 25, 2012 Share A very large percentage of hubs do this. The freehub body is not exactly centred on the axle and causes it to do a little waltz that is clearly visible when the bike is freewheeling in the stand. It does exactly that when the freewheel is engaged too, but the sprocket movement mesmerizes you so that you can't see it. It is more prevalent on freewheels with hardened steel bodies such as Shimano, than on aluminium-bodied freewheels. This is 'cause the steel is tempered after it was machined and slightly distorted in the process. Go for a ride. Seiously. Fair enough. Thanks. Dustbin Dog 1 Link to comment Share on other sites More sharing options...
lyslexic Posted June 25, 2012 Share How did you remove the plastic disk? I removed the cassette (chain whip and cassette removal tool) and the plastic bit was held with 3 or 4 clips which came off very easily) When you freewheel or when you pedal? freewheel. Bike is on a stand, I peddle the wheel then freewheel it and I can see the cassette moving side to side Is there play on the cassette if you move it by hand? There's no play if you move it by hand Link to comment Share on other sites More sharing options...
lyslexic Posted June 25, 2012 Share A very large percentage of hubs do this. The freehub body is not exactly centred on the axle and causes it to do a little waltz that is clearly visible when the bike is freewheeling in the stand. It does exactly that when the freewheel is engaged too, but the sprocket movement mesmerizes you so that you can't see it. It is more prevalent on freewheels with hardened steel bodies such as Shimano, than on aluminium-bodied freewheels. This is 'cause the steel is tempered after it was machined and slightly distorted in the process. Go for a ride. Seiously. Thanks, Problem solved Link to comment Share on other sites More sharing options...
StefandV Posted June 25, 2012 Share A few years ago I also noticed this on a new bike. My lbs put an enquiry to Shimano, who confirmed that this is indeed designed as such. The slight wobble assists in throwing off the chain when shifting gears. To confirm: go ride your bike. Link to comment Share on other sites More sharing options...
gummibear Posted June 25, 2012 Share A very large percentage of hubs do this. The freehub body is not exactly centred on the axle and causes it to do a little waltz that is clearly visible when the bike is freewheeling in the stand. It does exactly that when the freewheel is engaged too, but the sprocket movement mesmerizes you so that you can't see it. It is more prevalent on freewheels with hardened steel bodies such as Shimano, than on aluminium-bodied freewheels. This is 'cause the steel is tempered after it was machined and slightly distorted in the process. Go for a ride. Seiously. I had a look on my mtb and road wheels and there is no movement on the cassette,it's vas.Are we talking about the same thing? Link to comment Share on other sites More sharing options...
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