I was hefting around some tires here at the shop today and noticed that the Avon Distanzias are heavy! Very heavy! So, I weighed them and compared them to the Conti SM
REAR AVON DISTANZIA 150/60HR-17 16.2 lbs
REAR CONTI SM 150/60HR-17 12.1 lbs
FRONT AVON DISTNAZIA 120/70-17 10 lbs
FRONT CONTI SM 120/70-17 9.2
Conclusion- for a DRZ or other lighter weight street supermoto, a 4 lb difference on the rear and almost a lb on the front is no small amount of lard to be carrying around on such a slim bike.