they all break eventually here's my list
profile 180's broke 3 pairs bent
profile 175's broke 2 pairs cracked and snapped
primo power bites broke 1 pair ti spindle snapped
primo hollow bites broke 1 pair stripped
fly broke 1 pair pedal boss
demolition broke 1 pair snapped
wombolts broke 2 pairs in 1 month snapped
khe 2-piece... been holding since january (fingers crossed)