Tall Order Ramp 18" BMX Bike. If you are looking for a high-quality BMX designed for learning all of the basics on ramps, the race track or the street. The best possible starting advantage you can give yourself is to make it a very well respected tall order Ramp Bike. The Ramp 18 is ideal for those not quite ready to get on a full-size BMX. Aimed at 9-12 year olds its the perfect entry into the world of BMX. This stylish looking lightweight bike features a fully sealed rear cassette hub rarely seen on bikes in this price range.