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New Shimano cassette missing rivet pin

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New Shimano cassette missing rivet pin

Old 06-13-20, 10:05 PM
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elcyc
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New Shimano cassette missing rivet pin

Just purch'd a new 7-speed HG-41 cassette from an eBay bicycle-parts seller.
Noted that one of the three rivet pins is is missing (see rear photo).



Looking at from view may reveal why -- the spacer has no provision for third pin.


Not sure how common this is.
But won't get a flush mounting for rear/freehub interface (not without adding a minor shim or similar)
EDIT:
I just stuck a toothpick in the hole, and it goes in about 2.5mm before encountering resistance (pin from the top spacer??).

Last edited by elcyc; 06-13-20 at 10:11 PM.
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Old 06-13-20, 10:12 PM
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Think of the weight savings. Now you’ll have more time to wave at people while riding on the sidewalk. I seriously hope you’re riding carbon wheels!
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Old 06-14-20, 12:54 AM
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Remove the other two pins and you can take the entire cassette apart for a thorough cleaning of the individual cogs when they get dirty/grunged up.

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Old 06-14-20, 02:11 AM
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Originally Posted by elcyc View Post
But won't get a flush mounting for rear/freehub interface (not without adding a minor shim or similar)
Are you sure? On Shimano freehub bodies, the stops that the cassette sits against are on the "raised" portions, with the "valleys" going farther inboard, which should leave room for the rivets.

If you use a spacer, to fit it on a wider freehub body, the spacer will need to be shaped to accommodate the rivets. If you have a spacer that does not accommodate the rivets, it's fairly easy to check how the rivets align with the spacer (when they're mounted on the freehub) and file those spots down a little to make room.
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Old 06-14-20, 03:45 AM
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Originally Posted by elcyc View Post
Noted that one of the three rivet pins is is missing....won't get a flush mounting for rear/freehub interface ....
Youíre worrying over a non-issue. The base of the splined freehub body isnít a smooth flange. Itís notched to provide clearance for the rivets. Itíll fit just fine as it is.
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Old 06-14-20, 04:38 AM
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Uh.... no, toots ... I ain't ... 'cause some of us "non-issuers" ...

Originally Posted by dabac View Post
Youíre worrying over a non-issue. The base of the splined freehub body isnít a smooth flange. Itís notched to provide clearance for the rivets. Itíll fit just fine as it is.
Uh.... no, toots ... I ain't ... 'cause some of us "non-issuers" actually do have to use one of these flat spacers which come in direct contact with those rear rivet heads:



Hmmm .... I think a small pieces of Al foil, folded over 3x may work.
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Old 06-14-20, 08:10 AM
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Shimano Spacer

IIRC a SRAM compatible freehub plus one of these will fit a Shimano cassette.
my Mavic wheels came with just such a 3 notch spacer.
Plus a 1mm spacer, never did work out what thatís for!

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Old 06-14-20, 10:11 AM
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Here's an image of a 6-speed Uniglide cassette I took off a wheel. When I took it off the cogs were a black/brown colour from the buildup of the grunge on them. Being able to take that cassette apart enabled me to do a thorough cleaning of all the individual parts. This is what was under that grunge. I wish I'd taken a Before image.




I now do this with all my cassettes = remove the pins so I can use individual cogs and spacers.

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