I saw on Youtube there's a popular tourist that now uses 27.5x2.4" tires and some people in the mountain biking forum had some positive comments for 2.5" tires. So I'm sold on 2.4 except I think manufacturer's really should get on that bandwagon and make hybrids with 27.5x2.4" tires. (And V-brakes for me, too many manufacturers are abandoning this standard when QBP made a poll which showed about 20% voting for rim brakes. That's 1/5 of the possible customers out there.