Nitro SP (Super Premium) is mcuh stronger than the standard ANSI roller chain. This is achieved by manufacturing the chain from a higher grade alloy steel with more heat treatment. The SP chain is generally used in high shock load situations that offers greater fatigue resistance.
Offset links are not available for super premium chain due to the high strength of this chain. Offsets would significantly decrease the overall strength.
Connecting links for the super premium are pressed fit style only.