Claas is an agricultural machinery manufacturer founded in 1913, based in Harsewinkel, Ostwestfalen-Lippe, Germany, in the state of North Rhine Westphalia. The product range includes combine harvesters, forage harvesters, balers, mowers, rakes, tedders and other harvesting machines. Claas is believed to be the top combine harvester manufacturer in the world, producing its 450,000th machine in 2013. Claas is the world leader in rubber tracked wheel technology for combine harvesters. Over 45% of all new combines are equipped with rubber tracks. Claas also has the largest selling self-propelled forage harvester in the world and manufactures a full line of tractors.