The Vampires are 30% to 35% heavier than the regular Super Swamper. The deep lugs give longer tread life with the 43/32nds of tread depth and unsurpassed forward, reverse and lateral traction. Based on the Super Swamper tread design but engineered for muddier conditions. Spaced out lugs provide even better clean-out. Overlapped lugs are great in every terrain. Designed with a 1" deep lug. The 4-ply rating that makes it flat resistant.