Here is the break down -
BFG KM2:
285/75/16 = 11.3" width, 33.1" outer diameter, and 59lbs
305/70/16 = 12.2" width, 33.1" outer diameter, and 59lbs
315/75/16 = 12.3" width, 34.8" outer diameter, and 64lbs
345/75/16 = 13.6" width, 36.4" outer diameter, and 74lbs
The difference between the...