Originally Posted by
jonnojohnson
Hmm, I think I see another major flaw in my theory. The tri bars are made to clamp on 26 or 31.8mm handlebars. It seems that MTB bars are 25.4mm and it doesn't look like they have a wide enough clamp area either.
Nothing some shims won't fix. The mismatch could be fixed with a piece of extra inner tube (bike shops will have garbage ones for free) or you could cut up a soda can if you're just trying to match 26 to 25.4.