The Air Happy provides the smoothest ride available and the push bar is included. Customers say it best: "built like a tank." It's an instant family heirloom that children will enjoy and remember fondly when their own children are riding Kettrikes. This model has it all with the patented three-in-one Auto-Freewheel™ Coasting Pedal system, patented Quik-Adjust™ Telescoping Frame and oversized tubeless air tires on German-made ball bearings.
— Diane Robinson, owner of Silly Goose in Essex, Mass., told TDmonthly Magazine in fall 2007 that her number one best-selling item is Kettler bikes, such as the Kettrike Air Happy tricycle. "Kettler tricycles" are among the best-selling ride-ons, agreed Kristen Fennell, manager at Kids R Kids in West Roxbury, Mass.
— “The Kettler Air Happy continues to be our best seller,” said Jude Larene, owner of Izilla Toys in Seattle, Wash., during TDmonthly's March 2009 survey of ride-on sales. Larene said he sells an average of 10 Air Happy trikes per month.
— Ten percent of 60 retailers said in spring 2009 that Kettler trikes are their best-selling riding toy, with average sales of around four per month.