The 22271 was the LB 'ultimate mower' with aluminum 'Insight' deck, steel ball-bearing wheels with replaceable tires, Honda GSV 190 Commercial OHC engine w/iron sleeve, ball bearings and HD crank and Variable Speed drive. They only made a few in 2007 but Toro then took over and made the same thing in red and white, the 22156. These were available for a few years but have finally been dropped. I got mine in Spring of '08. The only one I could find was mail order. So 12 years later, its still my 'lifetime mower'.