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Black residue between fork and stem?

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Black residue between fork and stem?

Old 03-28-20, 01:16 PM
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rnothog
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Black residue between fork and stem?

Appears to be a very powdery residue...possibly carbon? Bike is a Specialized Roubaix di2 Ultegra. I've put about 2K mikes on it.

Anyone have anything similar happen?

Thought it could be just dust building up on a tiny weep of oil, perhaps...but not oily in the least...just dry, black dust.

All seems well with the steering. More powdery than gritty.
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Old 03-28-20, 01:16 PM
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Brake block dust.
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Old 03-28-20, 01:19 PM
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Originally Posted by Trsnrtr View Post
Brake block dust.
at the stem? I doubt thatís what it is.
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Old 03-28-20, 01:23 PM
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Originally Posted by noodle soup View Post
at the stem? I doubt thatís what it is.
Ah, I misread that. Ignore me and carry on.
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Old 03-28-20, 01:38 PM
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Originally Posted by Trsnrtr View Post
Ah, I misread that. Ignore me and carry on.
Itís just dust.

I see it on almost every bike I service(including my own). Iíd be willing to bet that thereís also some near the BB and hubs. It doesnít take much petroleum residual to collect dust.
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Old 03-28-20, 03:28 PM
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Everything feels fine...you'll recall that this has the Future Shock feature...which is a pretty sealed up unit, so I wouldn't think that would have been a problem.

Just surprised me...I'm used to dust collecting on anything oily (former USMC tanker), but this didn't seem oily or greasy. However, it is time for some basic maintenance anyway, so I'll do that and just keep an eye on it.

Thanks for the responses. Take care.
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Old 03-28-20, 04:29 PM
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Originally Posted by rnothog View Post
Everything feels fine...you'll recall that this has the Future Shock feature...which is a pretty sealed up unit, so I wouldn't think that would have been a problem.

Just surprised me...I'm used to dust collecting on anything oily (former USMC tanker), but this didn't seem oily or greasy. However, it is time for some basic maintenance anyway, so I'll do that and just keep an eye on it.

Thanks for the responses. Take care.
I wouldn't worry about the dust buildup. It's normal at theses areas. If the area becomes oily, take it to a specialized dealer.
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Old 03-28-20, 04:34 PM
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Originally Posted by Trsnrtr View Post
Brake block dust.
I think this is correct. It definitely gets up in there. I had to tap my fork steering tube out with a rubber mallet, so I did it over a (nice) chair, and there was a pile of brake block dust. This is with disc brakes, not rim brakes, BTW.
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Old 03-28-20, 04:42 PM
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Originally Posted by Trsnrtr View Post
Brake block dust.
Originally Posted by noodle soup View Post
at the stem? I doubt thatís what it is.
Originally Posted by noodle soup View Post
Itís just dust.

I see it on almost every bike I service(including my own). Iíd be willing to bet that thereís also some near the BB and hubs. It doesnít take much petroleum residual to collect dust.
Originally Posted by wgscott View Post
I think this is correct. It definitely gets up in there. I had to tap my fork steering tube out with a rubber mallet, so I did it over a (nice) chair, and there was a pile of brake block dust. This is with disc brakes, not rim brakes, BTW.
I doubt it's brake related, because I've seen it on brake-less bikes too.
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Old 03-28-20, 06:02 PM
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There's enough oil on the paved roads to create its own mess for dust to cling to bikes. A few minor puddle splashes and tires will spray oily residue on the bike. Then comes the dust and usual road debris.
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Old 03-28-20, 06:29 PM
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It is my first carbon fiber bike...initially worried that what I was finding was carbon. Gonna just pm it a bit and ride it.
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Old 03-29-20, 07:54 AM
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It's dust from where the steerer was cut. Just unbolt everything, clean it up, and reassemble.
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Old 03-29-20, 08:06 AM
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Originally Posted by jfranci3 View Post
It's dust from where the steerer was cut. Just unbolt everything, clean it up, and reassemble.
Doubtful.
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