Fitting of a 7 speed cassette
02-01-13, 11:47 AM
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Fitting of a 7 speed cassette
I have added a couple of spacers but I am not sure if the last chain ring is too proud.
I have not tightened beyond finger tight.
Does this picture look Ok?
I have not tightened beyond finger tight.
Does this picture look Ok?
02-01-13, 11:57 AM
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It's hard to know by looking. What hub do you have?
EDIT: If it were my wheel with an unknown hub, I'd use just enough spacer so that the outer cog has a slight "rock" against the rest of the cassette when the lockring is loose, but the whole cassette feels like one unit once there's some torque on the lockring.
EDIT: If it were my wheel with an unknown hub, I'd use just enough spacer so that the outer cog has a slight "rock" against the rest of the cassette when the lockring is loose, but the whole cassette feels like one unit once there's some torque on the lockring.
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02-01-13, 12:31 PM
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The lockring compresses the cassette against the back shoulder of the freehub body to make everything tight, For that to happen the cassette has to overhang the outside of the body, so the lockring presses on it without bottoming against the FH body.
It's that simple. If you're at all familiar with how threadless headsets are tightened by the top cap, you'll see that these are similar in concept.
So remove the lockring, and compress the cassette with your fingers. If you can bring it flush with the freehub's front edge, you need a spacer, If it still overhangs by a millimeter or so you don't.
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02-01-13, 01:30 PM
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02-01-13, 03:21 PM
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If necessary add enough spacer to the back to have the front overhang by 1-2mm.
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02-01-13, 06:30 PM
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I did this last year on a shimano wheel. It was last minute for a ride with my bike, horrified some roadies with the grinder 126mm spark show. The advise above is good, I'll just add that with some cassettes, the rivets or bolts that hold it together will deform the spacers and cause shifting issues when tightened, if this is the case, just remove them, spark show optional.
02-02-13, 10:50 AM
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If it helps, I found and bought my 4.5mm spacer on ebay!
02-04-13, 02:59 AM
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Many thanks for all the advice. I took the hint to engage brain which for reference resulted in 3 spacers of about 4mm in total.
Thank you.
Thank you.
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