Surprisingly the wheels only weigh a few pounds each! (I still can't think in metric and I don't have a real number.) They were primarily constrained by packin

Surprisingly the wheels only weigh a few pounds each! (I still can't think in metric and I don't have a real number.) They were primarily constrained by packing volume during cruise (https://mars.nasa.gov/msl/mission/spacecraft/cruiseconfig/ https://mars.nasa.gov/msl/mission/spacecraft/cruiseconfig/) and then by shock loads as the securing pyrobolts blew during landing (https://youtu.be/Ki_Af_o9Q9s?t=4m14s https://youtu.be/Ki_Af_o9Q9s?t=4m14s).