Re: [RBW] Re: 26.0 bar in 25.4 clamp?

[Peter Adler]

Not to pile on here, but reaming out the clamp area of this stem (or 
really, of any stem) sounds like a Very Unwise Idea. If you compare the 
thickness of the handlebar clamps of a 26.0 Nitto stem and a 25.4 Nitto 
stem, you'll see that the metal is the same thickness. You think maybe 
Nitto knows what they're doing? You think maybe the reason they're not 
reaming bigger bores in the clamps for 26.0 stems is because all that metal 
they forge in is necessary for safety?

Modifying a stem that's only available in a single clamp size is 
problematic, but conceptually understandable; that's why Nitto makes shims 
to fit 25.4/26.0 bars into 26.0/31.8 stems. But the Nitto Technomic is not 
a one-clamp-only stem. Nitto has already made hundreds of thousands of 
stems that are sized exactly right for your need. Doctoring a Technomic is 
a pointless effort; it's also penny wise and pound foolish. Both 25.4 and 
26.0 Technomics are common as dirt (the successor Talluxes are somewhat 
less so); this eBay search 

 
brings up 60 examples in various reaches from $40-65 shipped. What are your 
teeth worth to you?

Me, I buy my Nitto stems at swap meets. I've had four or five Technomics in 
both 25.4 and 26.0 over the years; I don't think I've ever paid more than 
fifteen bucks for any of them. At least three of my current stable are 
using such recycled stems now.

Here's a thought: Why don't you just post a want-to-buy for the stem you 
need right here (include both clamp size *and* reach, which you haven't 
mentioned at all), and see what shakes out? Your unshattered bones and 
unshredded flesh will thank you.

Peter "my body feels sharp, localized pain just reading this thread" Adler
Berkeley, CA/USA

On Wednesday, July 26, 2023 at 5:03:46 AM UTC-7 lconley wrote:

Personally, I would just buy the correct stem.

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Re: [RBW] Re: 26.0 bar in 25.4 clamp?

[Laing Conley]

Personally, I would just buy the correct stem.
If you do want to modify the stem you already have, I would use a brake
cylinder hone, generally available at local auto parts stores, Open it up
as little as possible, leave as much metal as possible. You can also use a
stem spreader (or snap ring spreader) to avoid damage to the bars. You can
als fabricate a spreader from a nut, bolt, washer, and coin.
Again, for the price of the tools and selling the stem you have, you can
get the correct stem which is what I would recommend. Aluminum is not as
forgiving as steel.

Laing

On Wed, Jul 26, 2023 at 7:50 AM Nick Payne  wrote:

> I'd use an adjustable reamer to ream the stem from 25.4 to 26.0. I did
> this back in the 1980s when I wanted to use 26.4 Cinelli bars in a Nitto
> Technomic stem. The adjustable reamer I have for seat tubes has enough
> adjustment (down to 23.75) to be used for stems as well.
>
> You can get cheap adjustable reamers off Aliexpress for less than $10. No
> idea of the quality (probably crap), but they should last long enough to do
> the job you need on an aluminium stem.
>
> Nick Payne
>
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> .
>

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[RBW] Re: 26.0 bar in 25.4 clamp?

[Nick Payne]

I'd use an adjustable reamer to ream the stem from 25.4 to 26.0. I did this 
back in the 1980s when I wanted to use 26.4 Cinelli bars in a Nitto 
Technomic stem. The adjustable reamer I have for seat tubes has enough 
adjustment (down to 23.75) to be used for stems as well.

You can get cheap adjustable reamers off Aliexpress for less than $10. No 
idea of the quality (probably crap), but they should last long enough to do 
the job you need on an aluminium stem.

Nick Payne

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[RBW] Re: 26.0 bar in 25.4 clamp?

[Joe Bernard]

I did it once decades ago and it's a bad idea. Even if you can pry that 
sucker open enough - risking structural weakening - you'll have the most 
scraped up bar you've ever scraped. 

On Monday, July 24, 2023 at 1:05:02 PM UTC-7 chasenl...@gmail.com wrote:

> how do you all make this happen? 
>
> i have only successfully done it once and the toll was high- huge and 
> noticeable cosmetic damage to the nitto dirt drop stem and to the sleeveish 
> clamp bar of nitto noodle bars.
>
> basically i wanna run a 25.4 technomic stem with some wide nitto drops, 
> without fudging up either too badly. i have noticed that while noodles have 
> a sleeve and crust bars in 26.0 have more of a ramp, does this make a 
> difference?  
>

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Re: [RBW] Re: 26.0 bar in 25.4 clamp?

[Garth]

All that is presented in that video is bar in a stem, not how it was done. 
I see lots of stupid YT videos like that, 30 seconds of sizzle(look what I 
did Ma !) and no steak(the how) to be seen anywhere. "All you gotta do is 
pry it open" . well no $hit Sherlock. Show me the money, baby ! 
On Tuesday, July 25, 2023 at 4:36:47 PM UTC-4 chasenl...@gmail.com wrote:

> https://youtu.be/z6-CdUeGAlk
> Ole Ronny discussing this very matter at the 16:00 mark! Ha
>
> On Mon, Jul 24, 2023 at 6:08 PM Garth  wrote:
>
>> Even "if" you bored out the stem, or shaved the bar,  it would be a bad 
>> idea as the amount of alloy there is there for a very good reason., so 
>> neither break.  Just trying to jam it is just as bad as then you damage 
>> both trying, then you have to buy a new bar AND stem. Just do the right 
>> thing from the beginning and buy a another stem. 
>>
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>>  
>> 
>> .
>>
>

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Re: [RBW] Re: 26.0 bar in 25.4 clamp?

[Chasen Smith]

https://youtu.be/z6-CdUeGAlk
Ole Ronny discussing this very matter at the 16:00 mark! Ha

On Mon, Jul 24, 2023 at 6:08 PM Garth  wrote:

> Even "if" you bored out the stem, or shaved the bar,  it would be a bad
> idea as the amount of alloy there is there for a very good reason., so
> neither break.  Just trying to jam it is just as bad as then you damage
> both trying, then you have to buy a new bar AND stem. Just do the right
> thing from the beginning and buy a another stem.
>
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> .
>

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[RBW] Re: 26.0 bar in 25.4 clamp?

[Garth]

Even "if" you bored out the stem, or shaved the bar,  it would be a bad 
idea as the amount of alloy there is there for a very good reason., so 
neither break.  Just trying to jam it is just as bad as then you damage 
both trying, then you have to buy a new bar AND stem. Just do the right 
thing from the beginning and buy a another stem. 

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[RBW] Re: 26.0 bar in 25.4 clamp?

[Frank Brose]

In a situation like this I either buy a different stem or buy a different 
bar. If it's visa versa with a 26 stem and a 25.4 bar you can use a shim 
but what you propose isn't meant to be.
Frank

On Monday, July 24, 2023 at 3:05:02 PM UTC-5 chasenl...@gmail.com wrote:

> how do you all make this happen? 
>
> i have only successfully done it once and the toll was high- huge and 
> noticeable cosmetic damage to the nitto dirt drop stem and to the sleeveish 
> clamp bar of nitto noodle bars.
>
> basically i wanna run a 25.4 technomic stem with some wide nitto drops, 
> without fudging up either too badly. i have noticed that while noodles have 
> a sleeve and crust bars in 26.0 have more of a ramp, does this make a 
> difference?  
>

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[RBW] Re: 26.0 bar in 25.4 clamp?

[Anthony Coffin]

I'm guessing the only safe way to do this is to change the size of the 
hole. Even if you can get the 26 bars on a 25.4 stem you end up 
compromising the integrity of both pieces, no?

On Monday, July 24, 2023 at 3:05:02 PM UTC-5 chasenl...@gmail.com wrote:

> how do you all make this happen? 
>
> i have only successfully done it once and the toll was high- huge and 
> noticeable cosmetic damage to the nitto dirt drop stem and to the sleeveish 
> clamp bar of nitto noodle bars.
>
> basically i wanna run a 25.4 technomic stem with some wide nitto drops, 
> without fudging up either too badly. i have noticed that while noodles have 
> a sleeve and crust bars in 26.0 have more of a ramp, does this make a 
> difference?  
>

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