Geax Street Runner tires are constructed of Aramid 3D Compound.
Aramid 3D Compound
The Street Runner is made up of Aramid 3D Compound. Each year Geax continues to refine its high quality compounds: in their latest release they use minute pieces of chopped aramid fibers mixed into the rubber. Aramid particles weight less than the rubber they replace, being stronger: the results are stiffer knobs and increased tire life and durability.