Originally Posted by
fietsbob
It all depends on the size... Folding flat Kevlar bead tires make great 3rd tires.
for spares, But a 27" /700c tire can be shall we say Bandsaw blade like reduced in diameter
for travel as well it rolls up in 3rds, by forming ins figure 8 and then into 3 rings.
...
This works well once you figure it out, but I can't think of a way to explain it that's clearer than this. You hold the tire in two hands, palms up, and sort of rotate and twist...you'll work it out. They'll fold down small enough to fit on a rear rack or into a small pack, but not a jersey pocket.
Another possible minor problem with Kevlar beads is that they can be finicky to mount. The bead is floppier than wire, so check to see that it's seated all the way around.