Riprock Coaster 20The Riprock Coaster 20 is the next step up from the Coaster 16 same intuitive coaster brake concept on the rear (back pedal to stop), V brake front for hand brake skills, in a 20 inch wheel size that suits riders 5 7 years old. Steel frame for durability when learning means dropping the bike. Key Features Steel frame durable enough for everyday kid use Coaster brake rear (back pedal to stop) easy for kids transitioning from a 16 V brake front with