Question about bicycle cassette
#1
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Question about bicycle cassette
HI,
I bought an Shimano HG-50 8 speed cassette.
When fitted, I could see that it did not seem to be exactly true.
For example, if I turn it backwards with my fingers and use a spoke as a reference point, it deviates by at least 1mm
I took everything apart and tightened up the free-hub.
The free-hub run perfectly true.
It was still the same when reassembled.
So I sent off for another HG-50 ( intending to send the defective one back).
The newest HG-50 was the same.
When I try I put on another new cassette ( an HG model but very old stock) it runs true ( it is a 7 speed with a spacer).
Does anyone have any helpful input.
Thank you
I bought an Shimano HG-50 8 speed cassette.
When fitted, I could see that it did not seem to be exactly true.
For example, if I turn it backwards with my fingers and use a spoke as a reference point, it deviates by at least 1mm
I took everything apart and tightened up the free-hub.
The free-hub run perfectly true.
It was still the same when reassembled.
So I sent off for another HG-50 ( intending to send the defective one back).
The newest HG-50 was the same.
When I try I put on another new cassette ( an HG model but very old stock) it runs true ( it is a 7 speed with a spacer).
Does anyone have any helpful input.
Thank you
#3
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How true was the old cassette?
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It seems like I used to have some 1mm or 1/2mm spacers around from some cassette applications. See if you can find one of those and try putting it behind your cassette. My bet is that'll fix your problem.
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Thanks for getting back to me.
The cassette is not loose at all; it fits perfectly but , as I said, seems to show a buckle.
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Are you certain it's not just the various shift ramps on the cogs that give the illusion that it's not true? Perhaps the old 7sp cassette did not have very prominent shift ramps (if at all)?
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Question about bicycle cassette
HI,
Yes, I thought that too.
So I used a magic marker on the rear part of the large cog as I turned it; it is like a buckled wheel ; marker on about a third of the cog , thin to thick to thin.
I tried the inner part of the large cog too; the marker shows on only one point ( four adjacent teeth) ; there are 4 separate ramped sections; so it is not the ramps.
Thanks
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Put it all together and ride it. Then you'll know for sure if it's an issue. Some will move more than what we'd imagine is acceptable. In actual use it likely isn't an issue for something that doesn't turn very fast.
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HI,
I bought an Shimano HG-50 8 speed cassette.
When fitted, I could see that it did not seem to be exactly true.
So I sent off for another HG-50 ( intending to send the defective one back). The newest HG-50 was the same.
When I try I put on another new cassette ( an HG model but very old stock) it runs true ( it is a 7 speed with a spacer).
Does anyone have any helpful input.
Thank you
I bought an Shimano HG-50 8 speed cassette.
When fitted, I could see that it did not seem to be exactly true.
So I sent off for another HG-50 ( intending to send the defective one back). The newest HG-50 was the same.
When I try I put on another new cassette ( an HG model but very old stock) it runs true ( it is a 7 speed with a spacer).
Does anyone have any helpful input.
Thank you
Did you, for some reason, disassemble the cassette? I modify my cassettes ( I remove the second position 14T on a 13-25T and add a 28T at the rear) and sometimes in reassembly the plastic spacers don't sit correctly and mess up the spacing of the cassette cogs.
Good luck.