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The Diamondback El Oso Niño is our smallest fat bike, made for kids who want to monster-truck over everything in their path. This little bear's frame and fork are made from high-tensile steel, tough enough for prowling the neighborhood and the woods. The 20-inch wheels are shod with 4-inch wide tires, allowing for low tire pressure and a unique style of riding. That low tire pressure lets the bike grab every bit of traction available and provides extra float for soft surfaces like snow, mud, and sand. With a 7-speed Shimano grip shifter to charge up hills and powerful disc brakes for control, El Oso Niño 20 takes riders wherever the trail or their imagination might go —quite possibly even to the moon!