The 219 KSJ chain has the same characteristics as the 219 Gold with a special hardening treatment of the pins (chromium KSJ).
This makes it a more robust chain intended for competition or the more demanding hobby market.
It is frequently used by competitors using karts of power less than or equal to 30HP.
With the 219 KSJ, the gain in performance is significant thanks to ultra low weight, very precise manufacturing tolerances, and exceptional resistance to elongation.
