I was looking into spikes to wear in my upcoming winter and spring track seasons for the 800-1600 considering Nike Mambas, Nike Victory 2's, and figured I would research some alternative brands... the Adizero Avanti and was shocked to see that they weigh more than twice what Mamba's and Victories do. Can anyone vouch for these spikes? Are they ridiculously heavy? Does this affect running (obviously not for David Rudisha), but will I be affected by the weight? Any advice would be appreciated.