BB219KRO (Blue) made a sensational debut in 1988 as RK Blue. BB219KRO has been the Champions choice in the highest categories such as KF class and OK class. The latest technology is used in every component in these chains. Note, the only difference between the colours is the colour itself for look.

The RK O-Ring chain is the best on the market. Used by many European teams RK’s sealed oring chains offer less torsional friction and increased high stress, high speed performance. Many people claim that an o-ring chain results in less horsepower. While those claims are true in low power/rpm engines, our dyno testing results in the high power/rpm engines prove otherwise. The RK o-ring chain produces more HP at high rpm in high power/rpm engines.