A tire includes a tread having a first plurality of tread blocks on a first side of an equatorial plane and a second plurality of tread blocks on the second side. Each of the first plurality of tread blocks has a first leading lug wall, a first trailing lug wall, a first leading sipe proximate to the first leading lug wall, and a first trailing sipe proximate to the first trailing lug wall. Each of the second plurality of tread blocks has a second leading lug wall, a second trailing lug wall, a second leading sipe proximate to the second leading lug wall, and a second trailing sipe proximate to the second trailing lug wall. The first leading sipes have a depth greater that of the first trailing sipes. The second leading sipes have a depth less than that of the second trailing sipes.