SCG DH got a pair at Walmart that are all rubber. They are fairly inexpensive (between $7 - $8) and they haven't come off yet unless he is taking them off. You might want to check out your local Wallyworld to see if they carry them. They were down in the hunting/camping area. He thinks they are called "ice spikes" or something along those lines. They are kind of hard to find so you might want to ask an associate.