73 LPX is low vibe. Note the arrow on the cutter that indicates it is low vibe.
72 LGX is low vibe. Note the arrow on the cutter that indicates low vibe.
Both 3/8 pitch LGX and LPX chains are yellow label.
What makes them low vibe?? A small amount of material is removed from the bottoms of the heels on the cutters and tie straps to allow the rear of these chain parts to "float" above the bar rails. When the cutting edge impacts the wood, the cutter has room to rock back slightly rather than being momentarily trapped between the wood and the bar rails. This allows some of the impact energy to be dissipated so it does not reach your hands. The picture below shows where the material is removed from the cutter heel - in house we call it a "clipped heel". Note how the cutter heel is floating above the bar rail, the white dashed line shows where the material has been removed from the bottom of the cutter heel.
The arrow on the chain or the symbol below indicates it has the low vibration "clipped heel".