Both on and off road, one of the reasons I got them was hoping to elimante hot spot on my foot on long rides on hot days with some less expensive sidis I was having, and that cured the problem I assume because of the stiff carbon sole. The tread on the soles are holding up great, buckles are holding never had one slip on me, though in an offroad accident I tore a piece covers where the strap goes into the shoe just cosmetic though. I have been very happy with them and they are very comfortable. I have had mine for about a year of heavy use. But specialized is very proud of these things price wise, it was quite a leap of faith on my part dropping that much on something I really wouldn't know would work out until after I took them out 50+ mile ride(which seems to be the case most cycling stuff that is fit related). I am dreading the day I have to replace them because I had to go through 3 pairs of shoes to find the right ones.