Trekking bars: figure 8 like bend, 1" center clamp, 7/8" tube .
Drop bars:, rams horn bend , 26mm center, 15/16" tube ..
position change near and far , versus up and down
control levers for 7/8 tube won't fit a 15/16" one..
there are shims to reduce down 'road' Stems from 26mm to 25.4mm,
but not the opposite.
I have trekking bars on my 2 most used bikes..
which happen to have a grip-shift that only fits the 22.2 tube..
how you detail the fit is more than just throwing a different handle bar on.
perhaps reach and height are not well considered..
and the different bar is going to need a whole different set-up.
I have a Randonneur bar , a particular bend of drop bars. and the way I set them up
took a years of riding , adjustments thinking and redesign to sort out..
then some of the pieces .. 'off the front' grip shapes
i used multiple sets to make a round bar wider and flattish surface..
they went out of biz.
if you want an easy alteration, Ergon GC3 integrates a broad flattish grip
and bar-end to work seamlessly together.. both well designed.
Last edited by fietsbob; 03-06-12 at 08:09 PM.