 In the 2002 model year, Klein replaced 6061 aluminium alloy with a new alloy called ZR 9000, that used zirconium in place of chromium; the new alloy had not been assigned an industry number and it was named after the unused 9000 series. Advertised improvements included a 190 grams (6.7 oz) decrease in weight per frame and a fatigue life five times longer than the 2001 model year frames.
