Not a messenger, but I work at a gym as a trainer. One friday my buddy calls me up and tells me he needs a couple plates (45lbs. each, probably about 2 ft. diameter) and a couple of 25lb. weight plates so we could train the next day. I loaded them all into my bag and proceeded to ride home 4miles uphill. Not ****ing fun. My shoulder went numb w/ 140lbs. of weights back there. The chrome bag did hold up pretty well though.