Originally Posted by
bironi
I am having one of our local builders put together a 650B on a 89 Merckx Century frame.
I know nothing about shifters and brakes that will work best with my townie bar choice.
The bar will be a Soma Sparrow in one of the two narrower widths offered.
I would like to see some pics of your similar solutions.
'K.
Last year I went with a more upright body posture on my '72 MBGR for rides as a commuter.
I'd previously changed the original x2 in front to an x3, leaving the x5 in back but with a larger range on the big side for the hills 'round here.
Went with a threadless quill stem adapter and a Postino 'bar (both from Velo-Orange). Entirely successful endeavor save for the now deeper reach to shift on the Campys it came with.
Here's mine:

I juts last weekend got these SunRace Thumbies (thanks ModernBike!) installed to my satisfaction.
Sharp(ish) curve and short(ish) straight grip length made positioning a little fussy, yet I think this will work.
(I'm setting it up for a trainer ride before making anything permanent.)
Your Soma Sparrow looks rather similar to my V-O's postino:
Soma Sparrow
V-O Postino
- if perhaps a little bit more curvaceous? Not a bad thing unless it causes cockpit fit problems from geometry conflict.
Postino's 570mm, the short SS is what, 490mm? Big difference!