[RBW] Re: Steerer Tube Honing

[Lungimsam]

Dats where i foist read it too

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[RBW] Re: Steerer Tube Honing

[George Schick]

While reading through this thread discussion something kept going on the 
the back of my mind, like I'd seen something about the steering tube 
butting somewhere on the Web.  So I finally browsed through some of 
Sheldon's articles and found this:

*Note:* Steerers  are 
butted  at the bottom, so 
the hole in the steerer is constant-diameter until near the bottom, then 
the walls taper inward in the butted section. 

It is *vitally important* that the stem extender (or stem) not be inserted 
so far that the wedge is installed where the steerer is narrowing, or it 
could come loose unpredictably. 

When this happens, only the edge/corner of the quill or wedge contacts the 
steerer, and it is trying to "grab" a slanted surface. 

This is sometimes a problem on smaller frames if you try to insert the stem 
or a stem riser too far down into the steerer. 

[image: Stem Inserted Too Far]
Illustration by Nicholas Flower 

On Monday, March 28, 2016 at 6:46:12 PM UTC-5, Frank Conway wrote:
>
> I'm trying to put a fairly long Technomic stem in my Heron and it is only 
> going about halfway down the steerer tube.  It didn't seem rusty or 
> anything, but I cleaned it up and tried taking a few thousandths off or 
> knocking off any high spots with a brake cylinder hone. It's nice and shiny 
> now but to no avail.  Anyone encounter this before?  If so, how'd you fix 
> it?  
>
> Thanks,
>
> Frank Conway
>
> Bedford, NH
>
>

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[RBW] Re: Steerer Tube Honing

[David Banzer]

A Technomic Deluxe is marked only as Nitto. 
Most likely that's what it is, but Ben's certainly offers older, obscure items 
on occasion. 
David
Chicago 

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[RBW] Re: Steerer Tube Honing

[Ron Mc]

It was sold as a Long Pearl, and it doesn't say either Pearl or Technomic, 
it says Nitto.  

On Saturday, April 2, 2016 at 11:14:51 AM UTC-5, Benz, Sunnyvale, CA wrote:
>
> Isn't a long quilled Pearl essentially a Technomic Deluxe? ...
>
>
> On Saturday, April 2, 2016 at 4:23:33 AM UTC-7, Ron Mc wrote:
>>
>> Probably doesn't help, at all, because I haven't seen another since - but 
>> about 5 years ago I found a Nitto Long Pearl stem at Ben's
>>
>>
>> 
>>
>> It gives me up to 90mm above the headset.  
>>
>> Like I said, haven't seen another since.  
>>
>>

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[RBW] Re: Steerer Tube Honing

[Benz, Sunnyvale, CA]

Isn't a long quilled Pearl essentially a Technomic Deluxe? From specs, they 
both look to be cold-forged and the finishing (at least on mine) are 
identical. The identifying difference for me (from 3') is the handlebar 
clamp nut – the Deluxe version has more of a triangular threaded plate 
while the normal Technomic has a real nut.

Rivendell sells what they call Tallux 
 (but looks identical to the 
Technomic Deluxe) that is 225mm tall. Both Ben's Cycle 

 
and Boulder Bicycle 

 
carry one that is 190mm tall (normal Pearl is 160mm tall). Maybe the latter 
is what you've been looking for?



On Saturday, April 2, 2016 at 4:23:33 AM UTC-7, Ron Mc wrote:
>
> Probably doesn't help, at all, because I haven't seen another since - but 
> about 5 years ago I found a Nitto Long Pearl stem at Ben's
>
>
> 
>
> It gives me up to 90mm above the headset.  
>
> Like I said, haven't seen another since.  
>
>

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[RBW] Re: Steerer Tube Honing

[John Hawrylak]

You need to be careful, the Tech Dlx has MIL of 80mm (vs the Tech at 
65mm).  This gives a maximum quilllength above the HS of 110mm and requires 
80mm in the steerer.

John Hawrylak
Woodstown NJ

On Tuesday, March 29, 2016 at 1:48:21 AM UTC-4, Lungimsam wrote:

> My Tech and Tallux stems both "buttomed" out in both my Rivbikes' steerer 
> tubes.
>
> I got a Nitto Pearl stem. Has less rise.
> Also, the Tech Deluxe has less rise . 190mm quill, I think.
>
>

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[RBW] Re: Steerer Tube Honing

[Ron Mc]

ben's also has a short Technomic that's 75mm (3 inches) above headset
http://www.benscycle.com/p-2516-nitto-technomic-short-quill-stem.aspx

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[RBW] Re: Steerer Tube Honing

[Ron Mc]

Probably doesn't help, at all, because I haven't seen another since - but 
about 5 years ago I found a Nitto Long Pearl stem at Ben's



It gives me up to 90mm above the headset.  

Like I said, haven't seen another since.  

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[RBW] Re: Steerer Tube Honing

[Evan E.]

I sometimes wonder why Rivendell sells only the Tallux with its 225mm 
quill. After all, not every bike has a long steerer/head tube and not every 
rider needs a tall stem. This is not a criticism of Rivendell; it's just an 
idle thought. (For my old Raleigh Competition I bought a Technomic Deluxe 
so that I could place my bars about one inch below the saddle without 
buttoming -- good expression, Lungimsam -- the quill.)

Evan

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[RBW] Re: Steerer Tube Honing

[Dave Johnston]

I had the same issue with the Heron Touring when I firsted assembled it and 
had a conversation with Todd Kuzma about it. Yes the steerer is butted. I 
just used a early Tech Dlx stem which is a cm shorter than the current tech 
dlx. At the time I wanted the bars an inch below the saddle, but as I age I 
have raised the stem enough that I could probably use a Technomic again.

-Dave 

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