Aggressive Tire Tread : Tread designed to provide max?imum traction for all types of surfaces, including sand, mud, snow, ice, and hard surfaces, wet or dry. NFPA 414, 2001 ed
National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}
