Foldable tire, consisting of kevlar which makes it extrem lightweight.
The MAC tire is the “WORLD’s First Freestyle Folding tire”!
This is not just a new tire like all the others, this one changes the weight of the complete bike dramatically because it’s less rotating mass at the end of the frame and at the same time it strengthens a lot by using Kevlar material. Most tires blow up under big pressure and they get biger than labelled. The Kevlar strips hold everything in original shape and make the tire really, really light. This new tire is made of hard rubber and holds up to 120psi.
Physical effect of less mass: Because the wheel is rotating while driving its mass has a mass moment of inertia and so an angular momentum. If you then move against the originally position the wheel its “resisting” against the movement ( force you feel if you move a spinning wheel, try it!;). Because of that, less weight in the wheels result in a lighter movement of the bike, which is especially important for tricks, where the BMX gets moved a lot.