Chrome Motor HD Ballistic Nylon. Chrome Motor bags are made with their proprietary HD Ballistic Nylon for improved heat and abrasion resistance. Chrome weaves high tenacity yarn in a true 1680 x 1680 ballistic nylon - 1680 threads on the warp and 1680 threads on the weft. Many commercially available ballistic nylons use 1680 on the warp but only 840 on the weft to reduce costs and still call the material "ballistic." They then coat their fabric with a rubberized abrasion-resistant layer. The result is 4x stronger than typical ballistic nylons.