and 172 having different heights the track 150 generally defines two ground contacting areas or contact patches indeed when the vehicle is ridden over hard surfaces such as but not limited to concrete and pavement only the higher traction lugs 171 will effectively contact the ground 30 as shown in fig3 a and 3b however when the vehicle is ridden over soft surfaces such as but not limited to snow mud and sand both traction lugs 171 and 172 will effectively contact the ground since the higher traction lugs 171 will at least partially penetrate into the soft surface thereby allowing traction lugs 172 to also contact the ground accordingly when the vehicle is ridden over hard surfaces the ground contacting area of the track 150 is the area generally defined by the length 177 shown in fig1 and by the width 178 shown in fig3 b whereas when the vehicle is ridden over soft surfaces the ground contacting area of the track 150 is the area generally defined by the length 177 shown in fig1 and by the width 179 shown in fig3 b since the width 178 is smaller than the width 179 the ground contacting area of the track 150 defined by the length 177 and by the width 178 is correspondingly smaller accordingly depending on the type of surface over which the vehicle is ridden the endless track 150 of the.