Re: Road Bars (26mm) in a Mountain (25.4mm) Stem = Problem?



E

Ed

Guest
In article <[email protected]>, Steve Sr. says...
>
>Is this small diameter difference likely to cause a problem in real
>life? I am trying to put a high angle (130 degree) stem on my road
>bike to improve the fit and the high angle stems seem to only
>available for Mountain bars.
>
>Thanks,
>
>Steve

I did this for the same reason. If the stem does not have a removable face
plate the bends in the road bar will not fit through the hole in the stem. Get
a one inch ******* (half round) file and enlarge the hole. The radius of the
file and the radius of the hole match closely so it is easy to enlarge the hole
evenly. Check you work by trying to put the bar into position in the stem. If
the stem head is aluminum you should be done in 15 minutes. Steel may take much
longer.

I was amazed that the 0.6mm difference in diameter is enough to prevent the
bends in the road bar from passing through the hole in the stem.
 
"Ed" <[email protected]> wrote in message
news:[email protected]...
> In article <[email protected]>, Steve Sr. says...
> >
> >Is this small diameter difference likely to cause a problem in real
> >life? I am trying to put a high angle (130 degree) stem on my road
> >bike to improve the fit and the high angle stems seem to only
> >available for Mountain bars.
> >
> >Thanks,
> >
> >Steve

> I did this for the same reason. If the stem does not have a removable

face
> plate the bends in the road bar will not fit through the hole in the stem.

Get
> a one inch ******* (half round) file and enlarge the hole. The radius of

the
> file and the radius of the hole match closely so it is easy to enlarge the

hole
> evenly. Check you work by trying to put the bar into position in the

stem. If
> the stem head is aluminum you should be done in 15 minutes. Steel may

take much
> longer.
>
> I was amazed that the 0.6mm difference in diameter is enough to prevent

the
> bends in the road bar from passing through the hole in the stem.
>


0.6 mm is huge in this kind of work. Try to fit a bearing in a hole that is
0.6 mm to small. Boy, that would be a press fitting,

Lou
 
In article <[email protected]>, Lou Holtman says...
>
>
>"Ed" <[email protected]> wrote in message
>news:[email protected]...
>> In article <[email protected]>, Steve Sr. says...
>> >
>> >Is this small diameter difference likely to cause a problem in real
>> >life? I am trying to put a high angle (130 degree) stem on my road
>> >bike to improve the fit and the high angle stems seem to only
>> >available for Mountain bars.
>> >
>> >Thanks,
>> >
>> >Steve

>> I did this for the same reason. If the stem does not have a removable

>face
>> plate the bends in the road bar will not fit through the hole in the stem.

>Get
>> a one inch ******* (half round) file and enlarge the hole. The radius of

>the
>> file and the radius of the hole match closely so it is easy to enlarge the

>hole
>> evenly. Check you work by trying to put the bar into position in the

>stem. If
>> the stem head is aluminum you should be done in 15 minutes. Steel may

>take much
>> longer.
>>
>> I was amazed that the 0.6mm difference in diameter is enough to prevent

>the
>> bends in the road bar from passing through the hole in the stem.
>>

>
>0.6 mm is huge in this kind of work. Try to fit a bearing in a hole that is
>0.6 mm to small. Boy, that would be a press fitting,
>
>Lou
>
>

True. But the part of the handlebar where the bends are is less than 25.4mm.
The bends will not fit through 25.4 hole but will fit through a 26mm hole.
 

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