D.I.D. is world's leading manufacturer of motorcycle and ATV chains. D.I.D. drive chains are top-quality products with long life, low weight, low friction and outstanding performance. D.I.D is World’s #1 original parts supplier for Japanese and European motorcycle manufacturers; D.I.D chains are also very popular choice of racing teams; they are used by some of the world's best riders such as Valentino Rossi, Chris Vermeulen, Chad Reed, James Stewart or Ricky Carmichael.