Diamond is Continental’s cutting machine technology. According to the inquiry of Autohome, there is a diamond logo on the Continental tires. Diamond is Continental's cutting machine technology. The diamond cutting pattern is effective in scratching and shrinking water, improving the wetland grip of the tires. Continental Tire was founded in Hannover, Germany in 1871. It established the Liema trademark in 1882 and produced Germany's first pneumatic bicycle tire in 1892.