Westlake SL309 LT215/85R16 115/112Q EOVERVIEWThe SL309 from Westlake is an all-purpose . heavy-duty all-season tire that's designed for use on light trucks and SUVs. Backed by a 40 .000 mile limited manufacturer tread life warranty . the SL309's staggered tread blocks improve traction in dry . wet . and light winter weather conditions while a steel-belted construction increases strength and durability for a higher load carrying capacity and longer tread life.