Pneumatic tire for offroad vehicles

In a pneumatic tire for an off-the-road vehicle such as an all terrain vehicle or the like having a tread formed from an elastomeric material carried on a reinforced carcass and including an outwardly directed road engaging portion and sidewalls each terminating in a reinforced bead for mounting on a supporting wheel, the sidewalls including shoulder portions extending from said road engaging portion inwardly toward the bead, the tread extending over the road engaging portion and said shoulder portions completely around said tire, the improvement wherein said tread comprises

• a plurality of primary lugs arranged in sets equally spaced around the periphery of the tire on each side of the circumferential centerplane of the tire, each said set of primary lugs consisting of a long lug and a short lug, with the sets of primary lugs on each side of the centerplane being offset circumferentially by a distance substantially equal to one half the circumferential pitch of the lug sets,
• each said long lug including an elongated, substantially straight central body portion extending inwardly from a point adjacent said shoulder at an acute angle with respect to said centerplane and each said short lug including a curved body portion overlying and extending into adjacent edge portions of said road engaging portion and one of said shoulders,
• said primary lugs each including an outer end portion extending onto said shoulder at an obtuse angle relative to said centerplane, and an inner end portion extending at an acute angle relative to said centerplane which is less than the acute angle of said substantially straight body portion.