Managed to squeeze some Surly Knard 3" tyres on my Ritchey P29er - particularly following the spell of dry weather, I was keen to see how they handled on really sandy conditions. Not quite the full float experience, but I had a lot more control in deep sand in comparison to 2.4" tyres. Grip was simply awesome (tubeless at 8psi) and you could simply rail singletrack - just lean those babies over and no worries about grip. At kilo each tyre, take a bit of effort to wind them up, but once up to speed they were unstoppable - no worries about roots and rocks either. Looking forward to getting my new frame with extra clearance - there's no way this is just a fad, been MTB'ing for over 20 years and this is the best fun bike I've ever ridden. Should be great as an all-day expedition bike too.