Schwalbe Big Ben's in a 50mm width. I really didn't know much about Schwalbe tires before I tried a set of these on my Bombadil a number of years ago, yet they were love at first ride. They have a wonderful round balloon effect to them that I never felt with any other tire of it's likeness. They're just plain fun, being they are the same carcass as Big Apples with additional tread. The added bonus is their incredibly long wear rate and puncture resistance. I ride them at around 30psi even on the road. Forget the psi suggestions on the label, pumping them up high just defeats the fun feel to them. Off road I've ridden them @25psi and I could go a little lower.