The tread with the closed shoulder not only enhances stability but also reduces rolling resistance, greatly increasing the tire's fuel efficiency. Its whole structure is designed to maintain the ideal shape of the tire, resisting deformations that would spoil its rolling resistance.

Even the shoulder ribs have their own biting edges on both sides that help with grip. The tread blocks are also slightly rotated with rounded edges and slight indents. Each tread block has a lateral zigzag groove in the middle that enhances grip. The two zigzag grooves and the other two straight ones do an outstanding job channeling water and snow away from the tread footprint.

It completely evens out tread wear by distributing the driving pressure across the tread. This is mainly thanks to the closed shoulder design that makes the tread pattern as wide as it is. The result is slow and uniform wear, while irregular wear is completely prevented thanks to the tire's stability. This guarantees a long tread life for the BDL71, without sacrificing all its beneficial qualities.