[Yak] New BF Folding Stem

[Walter Lapchynski]

It will work on right folds, though we haven't tried them on all  
possible variants. There may be some interference between saddle and  
stem and/or handlebars and wheel depending on the configuration. I  
will say that if you watch the video, you hear about David Seybert's  
positive experiences. He's got a right fold.

We cannot make a custom adjustable or ultralight version of the  
folding mechanism, but we can supply a fixed or adjustable height  
folding stem riser with a four bolt ahead stem that would be  
compatible with split handlebars if you have a handlebar type that  
would otherwise require a custom adjustable or ultralight, i.e. drop  
bars. It won't fit in the current TravelBag this way, though.

Lastly, in all technicality, the stem is in many ways very similar to  
the tikit stem, too. We have no reason to suspect there will be any  
issues based on our testing.

On Mar 18, 2010, at 11:55 AM, Theodore Marz wrote:

> I suspect it is for Left Fold bikes only - the video stated a date  
> range for which the mod is good for
>
> They also stated that if you had a Friday custom adjustable stem  
> that it would not be a replacement.
> I don't know if this is because there is something different about  
> the base of the stem (headset size),
> Or if it just because of a lack of a aheadset style stem (from the  
> stem riser out to the bars).
>
> Interesting - if I were multimodal commuting with my bike, it could  
> be an option.  I'm not, though.
>
> This is also the kind of stem tech that Dahon is using on their  
> bikes.  Their folding stems had some
> Trouble a while ago, and were subject to a recall.  The BF design  
> does not look like it would have much trouble, because of the way it  
> sockets in and raises up - there should not be any force on the  
> hinge point itself.
>
> Ted Marz
> Sr. Member of the Technical Staff
> Software Engineering Institute
> Carnegie Mellon University
> ph: 412-268-5891       fax: 412-268-5758
>
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