Hi Rod,
Beautiful bike! Looks so great with those wide tires.
I have a set of Billie bars that I’ve put on several bikes, never had this 
happen.

I have, however, had this happen when a 25.4 bar is put in a 26.0 clamp 
stem. The fit can be snug enough to not identify an immediate need for 
shimming. You can tighten it down firmly enough, without bottoming out the 
stem clamp, and ride for quite a while really, but then end up with some 
slippage.  Also happened back in the old drop bar world, with 26.0 and 26.2 
(Italian?) stems.

If you loosen the quill stem bolt on that technomic and lift it outta the 
steerer, the clamp diameter should be stamped down under there.
Might not be your issue, but an easy place to start.

Hope this helps,
Calvin
On Saturday, May 14, 2022 at 6:42:29 AM UTC-7 Rod Holland wrote:

> Last year, I bought one of the Web Specials, an Appaloosa set up with a 
> 1x10 drivetrain, Rene Herse Fleecer Ridge Endurance tires, v brakes, and 
> Billie bars. This arrived during our New England winter, and final assembly 
> and first rides happened in January, during a break in the weather, after 
> which the bike sat in the basement, at the end of of various queues, until 
> yesterday, when I put it on the road, starting with a 25-mile mixed surface 
> ride.  
> [image: PXL_20220513_201728684.MP.jpg]
>
> The bike is set up for an upright riding posture, a bit of a departure for 
> me. A bit more than halfway through the ride, I had to stop and dismount a 
> little abruptly, and the Billie bars slipped in the Technomic stem, 
> settling (apparently quite securely) into a roughly 45 ° angle. 
> [image: PXL_20220513_211233095.jpg]
>
> I had just been speculating about how they might ride with a bit of 
> downward deflection, so I got a chuckle out of that, and proceeded to ride 
> towards home in a more aero posture. 
> [image: PXL_20220513_211904103.jpg]
>
> I stopped in at my LBS, and they were good enough to restore the bars to 
> their intended position on the spot. All went well until a block before my 
> house, when, during braking, the bars slipped back to their previous droopy 
> position.
>
> I'll be taking the bike back in to the LBS next week. Question: has anyone 
> else encountered this "self-adjusting" behavior with Billie bars in a 
> Technomic stem? If so, what caused it? What cured it?
>
> V brakes are one of the elements of novelty to me in this build, and I've 
> been trying to apply them gently, but suspect that in each case above my 
> braking created a transient inertial load on the handlebars.
>
> rod
>
> Eastern Massachusetts
>
>
>

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