Originally Posted by
spambait11
The BF splittable bars should fit most stems, but they require a reinforcement sleeve to keep the bars from flexing. Don't know if this sleeve is included with a bar purchase.
There is a sleeve that goes over the 7/8 tubing that brings it to the 25.4 size, mayube this is what you're talking about? Also internal to the 7/8 OD tubing is another tube that pairs the two together.
However, for me this is a moot issue since the torque required to flex this would have bad consequences on the usually long stem. I'm gentle with my folding bikes with pulling on the bars.