GNU CARBON CREDIT ASYM 2017 GNU CARBON CREDIT ASYM 2017 : 11182 462 -30% 324 GNU Carbon Credit Asym 2017 . ! , ! : Directional Twin : Banana Technology (BTX) : Magne-Traction Core Blend: Lightest Co-Extruded Base Co-Ex PBT Top UHMW Sidewalls Bi-Axil Glass HANDCRAFTED IN THE USA NEAR CANADA!