I have K-summits that I fit to a VW Tiguan due inside clearance issues. We have driven on them a number if times, admittedly to Falls Creek. Ihave driven the Hotham road and it certainly has far greater potential for difficulty but it is a little irritating that Hotham is effectively not an option with our curent vehicle. I appreciate that K-summits require the attachment to be tight and user error could be an issue but user error is also an issue with poorly fitted diamond chains. Not sure that I am convinced by the argument about percentage of the tread that is not covered. Surely it is about the contact patch of the chain with the road surface rather than the percentage of the tyre that is covered. The contact patch of the K-summit itself is independent of the width of the tyre inside of it. It would be intersesting to see actual numbers for the chain contact surface area of a k-summit versus a standard diamond chain. I wouldnt be surprised if the k-summit had more chain in contact with the road surface given the design pattern of the chan itself compared with a standard diamond pattern.