[RBW] Re: What is this and how do I get it off my stem?

2016-10-18 Thread Lungimsam
1.3 below saddle on Bleriot. You see the diff in geometries here. Way more stem 
exposed. Same seat height (71cm).
https://www.flickr.com/gp/70237737@N00/v1o83u

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-18 Thread Lungimsam
https://flic.kr/p/jTpszH

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-18 Thread Lungimsam
Good eye!
I ride with bars 1.3cm below saddle. That means slammed stem on my 52 Sam with 
Fistful of seatpost.
My Tech standard stem didn't work so I got the Tech Deluxe as it had less rise. 
Tech bottomed out on Sam. Deluxe stopped about 2mm short of bottoming out so it 
worked.
I don't think I knew about pearl Stems at the time. Now I use pearl stems.

I traded the Sam for a Ram. I use a Pearl on the Ram.

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-18 Thread A CT Cyclist
Ok, I just have to ask. Why are you using a Technomic stem when you clearly 
don't need all that height? I don't think I've ever seen a threaded stem 
inserted that far!

On Sunday, October 16, 2016 at 3:29:46 PM UTC-4, Lungimsam wrote:
>
> Came off my Sam. Exposed stem is clean as you can see.clean. Stem sunk 
> into steerer tube has some surface corrosion of some sort on the aluminum 
> Technomic deluxe them. How do I get the corrosion off the stem and restore 
> it to its original lustre?

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-17 Thread Cameron Murphy
That is rust or iron oxide from the inner surface of the steerer.   
Luckily, an anodized aluminum surface like your Technomic Deluxe stem is 
pretty tough.  Some vinegar and fine steel wool should remove it without 
any further damage to the anodized surface.   If yours was a regular 
Technomic, it probably wouldn't be anodized, and thus could be scratched by 
the steel wool.   To prevent problems like this in the future, it is 
important to grease the inside of the steerer before assembly.  (A regular, 
non-anodized stem would be even worse, as the aluminum-steel interface sets 
you up for galvanic corrosion.  In that case, the stem would be attacked 
preferentially, leading to large volumes of aluminum oxide, and possibly a 
stuck stem in bad cases.)

Cameron Murphy
San Marcos, CA

On Sunday, October 16, 2016 at 12:29:46 PM UTC-7, Lungimsam wrote:
>
> Came off my Sam. Exposed stem is clean as you can see.clean. Stem sunk 
> into steerer tube has some surface corrosion of some sort on the aluminum 
> Technomic deluxe them. How do I get the corrosion off the stem and restore 
> it to its original lustre?

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-17 Thread Kai Vierstra
This will sound overly fussy, but if you track down some fine bronze wool 
there's no threat of rubbing any ferrous deposits  into your lovely aluminium 
stem. Not sure if it really happens to aluminum, but bronze will "rust" if 
rubbed with steel wool. Anyhows, I assume the discoloration on the stem is 
caused by rust from the close proximity of the stem and steer tube, so yeah, 
this sounds overly fussy.
-Kai
Brooklyn NY 

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-17 Thread Alex Wirth- Owner, Yellow Haus Bicycles
# steel wool, 30 seconds later it will be a site to behold.

On Sunday, October 16, 2016 at 3:29:46 PM UTC-4, Lungimsam wrote:
>
> Came off my Sam. Exposed stem is clean as you can see.clean. Stem sunk 
> into steerer tube has some surface corrosion of some sort on the aluminum 
> Technomic deluxe them. How do I get the corrosion off the stem and restore 
> it to its original lustre?

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-16 Thread Surlyprof
I can personally attest to how well Quick-glo works.  I've tried everything 
to refinish some vintage, aluminum GoodForm chairs 
(http://pastpresentfuture.net/archives/gf.html).  Nothing worked as well as 
the Quick-Glo.  The stuff is taking off decades of age and abuse very 
quickly with just an old tshirt for the polishing rag.  I'm stocking up 
next time I go to Riv!

John

On Sunday, October 16, 2016 at 12:55:29 PM UTC-7, Howard Hatten wrote:
>
> Grant is selling this stuff. Sounds like it might work. 
>
> http://www.rivbike.com/product-p/googlo.htm
>
> Good luck
> Howard
> Livonia Mi
>
>

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-16 Thread Frank Brose
Busch aluminum polish. I've never seen anything on aluminum it won't take 
care of. Not a wipe it on,wipe it off deal but with a little elbow grease 
you can restore just about any stem to new like condition.
Cheers,
Frank

On Sunday, October 16, 2016 at 3:29:46 PM UTC-4, Lungimsam wrote:
>
> Came off my Sam. Exposed stem is clean as you can see.clean. Stem sunk 
> into steerer tube has some surface corrosion of some sort on the aluminum 
> Technomic deluxe them. How do I get the corrosion off the stem and restore 
> it to its original lustre?

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[RBW] Re: What is this and how do I get it off my stem?

2016-10-16 Thread Garth
You likely already have something to remove it. WD-40, grade  steel 
wool(does not remove anodizing), metal polish to name a few. 



On Sunday, October 16, 2016 at 3:29:46 PM UTC-4, Lungimsam wrote:
>
> Came off my Sam. Exposed stem is clean as you can see.clean. Stem sunk 
> into steerer tube has some surface corrosion of some sort on the aluminum 
> Technomic deluxe them. How do I get the corrosion off the stem and restore 
> it to its original lustre?

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