Crafted from cast aluminum, the virtually indestructible Convert-O Bike was designed in 1949 by the Anthony Brothers. A classic design that can grow with your child, simply remove the rear axle and insert one of the wheels into the rear fork to transform this tricycle into a big-kid two-wheeler. Plus, the seat can be adjusted back and forth, accommodating children of different sizes. The solid rubber tires and high-quality aluminum alloy frame ensure that it will last long enough for your grandkids to enjoy it as much as your children. The lightweight Convert-O Bike can even be left outside for long periods. A label on the front attests to its authenticity. Simple assembly required.