If you are wondering what a "fat bike" is, no, it isn't a bicycle for fat people, although I am sure heavier people would love one. It is a bike with a frame that can fit very large tires, over 4" wide actually. They are low flotation so tire pressure is around 15 to 20 psi. Ride them over about anything, tree roots running at an angle, beach sand, snowmobile trails, pretty much anywhere that you would stick and bury a mountain bike these bikes will go. Not the greatest on pavement however, the tires are too grabby for that sort of riding, but for a river beach like this one, this thing is the berries! My fat bike: Here is a 5 minute video of my first ride with this thing at the river beach a few miles from the house. Excuse the quality, it was taken with my Samsung phone in my shirt pocket! This area (in SE Alaska) is where the Chilkat river dumps into the sea and beings that it was near high tide (+20 feet) the ocean backs up the river for a few miles so the river channel at low tide is way out there in the body of water. The dog is probably my best friend. Smart, loyal, loves to run as this is his favorite place to go. He is a blue eyed pure bred Australian Shepherd named Aikau after a famous Hawaiian surfer. We are his second owners and he came with that name so we kept it.