I've been riding a 650B Bleriot for the past year and it has become my favorite ride. I really enjoy going on rambling rides where I'll explore new roads, trails, alley's, etc. The Bleriot is perfect for this style of riding. We have several gravel rail/trails in the area and the fat cushy tires are ideal for that type of road. I've also ridden over single track but the bottom bracket is pretty low so you can't get too crazy. I do get crazy looks from the mt. bikers though when they see me coming down the trail on my full fendered steed! Also, I'm not a racer, but when I'm on the busy bike trails in town I'm usually doing the passing. I like to push it and I don't find the cushy 36mm tires to hinder me at all and although they do take a little while to get used to they really a versatile tire. Example: The other day I was riding through a residential neighborhood and came upon a road that was getting new gravel poured on the streets for the chip/seal pavement . If I was on a skinny tired road bike I would have been pissed and down a u-turn but on the Bleriot I said YES and went blasting through the middle of the mess. I don't know if 650B will stick around but I'm sold and am stocking up on tires and currently working on putting together another 650B conversion bike.