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Is dust sleeve needed?

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Is dust sleeve needed?

Old 03-12-21, 08:01 AM
  #1  
Spellscape
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Is dust sleeve needed?

Hi all
Is dust sleeve really needed for older BBs? (BB without holes)
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Old 03-12-21, 08:13 AM
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I would say yes. The sleeve is there to keep debris, from the road bottom, side or top, from getting in.

In truth, the bottom and top are not significant issues, but so much can get into the bottom bracket from the top (seat post enters seat tube lug). Water, carrying this that or the other thing, seeps down, past the seat post (made worse if the fluted one have the flutes inside the lug) and is prevented from getting into the actual bearing cavity itself. The water, however, can get in there, so the sleeves are not the perfect answer unless there is some place, in the bottom bracket lug, for water to escape easily.

Can you get along without the sleeve. Of course, but why would you want to?
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Old 03-12-21, 08:13 AM
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Maybe not with no BB shell cutouts and you don't ride in the rain. But I definitely use them in all my keepers. If I have a spare, I'll put it in a nice flip. They usually already have them in place.
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Old 03-12-21, 08:53 AM
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Ok let's rephrase this - should i buy them?
Can I use modern dust tubes from shimano Holowtech 2 BB as some kind of replacement?
I have old shimano JSA BB on lose bearings and old cloter BB
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Old 03-12-21, 09:26 AM
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Originally Posted by Spellscape View Post
Ok let's rephrase this - should i buy them?
Can I use modern dust tubes from shimano Holowtech 2 BB as some kind of replacement?
I have old shimano JSA BB on lose bearings and old cloter BB
Allow me to repeat what I suggested in post #2...

"Can you get along without the sleeve. Of course, but why would you want to?"

That said, I don't really know what fits what these days. Nor does this little fellow or fellowette, who made a cozy home in the bottom bracket housing of an early eighties Fuji something or other...

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Old 03-12-21, 11:19 AM
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Originally Posted by SurferRosa View Post
Maybe not with no BB shell cutouts and you don't ride in the rain. But I definitely use them in all my keepers. If I have a spare, I'll put it in a nice flip. They usually already have them in place.
^^^ if no BB cut out I would agree with SR.... It is hard for debris to get into the BB.
Best, Ben
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Old 03-12-21, 11:29 AM
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Originally Posted by randyjawa View Post
Allow me to repeat what I suggested in post #2...

"Can you get along without the sleeve. Of course, but why would you want to?"

That said, I don't really know what fits what these days. Nor does this little fellow or fellowette, who made a cozy home in the bottom bracket housing of an early eighties Fuji something or other...

That looks like "Designed by Norco" so perhaps it was a Nishiki of some sort.
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Old 03-13-21, 07:22 AM
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A rolled business card works too.
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Old 03-13-21, 07:29 AM
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Originally Posted by Narhay View Post
That looks like "Designed by Norco" so perhaps it was a Nishiki of some sort.
Yup, you are absolutely correct. A Nishiki Rally, as I recall. That said, I don't really recall well these days. Memory is a thing of the past, for me these days.
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Old 03-13-21, 07:45 AM
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I'd worked on so many low end bikes that didn't have a dust sleeve, that when I finally got a bike that did have one, I forgot to put it back in during re-assembly. I wasn't about to take them back apart, so there are two dust sleeves laying on my work bench now.
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Old 03-13-21, 11:25 AM
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Originally Posted by Spellscape View Post
Ok let's rephrase this - should i buy them?
Can I use modern dust tubes from shimano Holowtech 2 BB as some kind of replacement?
I have old shimano JSA BB on lose bearings and old cloter BB
...in the very ancient times of yore, before there were so many of them lying around at the bike co-op for cheap, I made a couple of them, from an old aluminum soda can.
You just use a shear to cut a slice of aluminum from the soda can that is more or less the shell width between the inside edges of the two BB cups (you need to guesstimate this...it doesn't hurt if you're a little short).

Then you sort of gently bend it around into a cylinder, with overlapping ends, but not so tightly wound that it's smaller than the shell diameter.

Slide it in until it bottoms on the inside edge of the fixed cup. Expand it so the thing stays tight against the interior walls of the shell, covering all the holes from the frame tubes and stays that enter. Works fine.
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Old 03-13-21, 12:20 PM
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Originally Posted by 3alarmer View Post
...in the very ancient times of yore, before there were so many of them lying around at the bike co-op for cheap, I made a couple of them, from an old aluminum soda can.
You just use a shear to cut a slice of aluminum from the soda can that is more or less the shell width between the inside edges of the two BB cups (you need to guesstimate this...it doesn't hurt if you're a little short).

Then you sort of gently bend it around into a cylinder, with overlapping ends, but not so tightly wound that it's smaller than the shell diameter.

Slide it in until it bottoms on the inside edge of the fixed cup. Expand it so the thing stays tight against the interior walls of the shell, covering all the holes from the frame tubes and stays that enter. Works fine.
I think you could do this with a piece of mylar. When you roll it up, and let go of it it will try to unroll, holding it in place. Now, if you took two pieces, and cut each narrower then the distance between the cups, then rolled them up together, but staggered widthwise, so it was a little wider than needed, it would self adjust to the exact size needed, as you install the adjustable cup, I think.
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Old 03-13-21, 12:32 PM
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You can make one out of a plastic water/Coke bottle. They are even close to the correct diameter and roll up on their own.
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Old 03-13-21, 12:44 PM
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The only bike I have with BB shell cutouts is my '80 Gios Torino. I asked my LBS mechanic if the sleeve is necessary. He recommended I install it since there's an opening for water, dirt, debris etc to enter

I haven't worried about it since.
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Old 03-13-21, 03:41 PM
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Originally Posted by randyjawa View Post
Yup, you are absolutely correct. A Nishiki Rally, as I recall. That said, I don't really recall well these days. Memory is a thing of the past, for me these days.
Who are you??? Where am I???
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Old 03-13-21, 04:09 PM
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Originally Posted by Narhay View Post
Who are you??? Where am I???
Actually the question that mostly comes up is "What was I going to do?"
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