I have a 2.2 Crossking on the rear and a 2.3 Crossking on the front. Great combination. I have ridden endless tough rocky trails around southern CA and no cuts, gashes, punctures. They are light but tough. I was concerned that they might not hold up because they are light weight but I can say that they do not fail despite the serious abuse I put them through. The 2.3 has very nice deep knobs that really dig in making it perfect for a front tire. The 2.2 has more medium knobs which make it perfect for rear. They came spec'd on my racy hardtail and I already burned through one rear. I bought another 2.2 for the rear because I like and trust it. I like the 2.3 so much may put it on my Yeti SB100 too. The knobs are big enough on the 2.3 to make it really have a burly trail tire feel. Thank and enjoy your ride!