I just switched over from a pair of (orginal) Korker Guides with Boa lacing to the Patagonia Ultralights (which I will be putting on some Simms Hardbite studs). With the Korkers, I switched between all but the original rubber quite often. I used the studded felt and bolted rubber (I say bolted as that's what the winter studs look like - big bolts LoL), most of the time. Loved those soles!! That being said, check out the Simms Hardbite Studs or Hardcleats! Also Patagonia makes a pretty beefy crampon, but the pricepoint sux!!