If you stay on ice either the screws or K/Ks would be my choice. Not too hot on the pavement though, they wear out quick (I had kks last year). K/Ks can be "tuned" too - they are directional due to the way they are cut. Screws are cheap. If you are going to be on real roads the automotive stud is the way to go. Not sure how short the kks come, maybe 1/2" - how much rubber do you have? I'm running Ching Sins from JC Whitney - about $100 for the pair.