Learning Center / What does /SL or /XL mean at the end of the tire size?


SL stands for “Standard Load.” The words “Standard Load” will be stamped somewhere on the sidewall of the tire. XL means “Extra Load.” Tires with an XL designation can carry more weight than tires without the designation. The XL designation is listed at the end of the tire size (for example, 225/40ZR18/XL).