Oregon 22-155 Magnum Gatorline Round Trimmer Line .155-Inch by 320-Foot

What It Is

The Oregon 22-155 Magnum Gatorline is a heavy-duty, round trimmer line designed for commercial-grade string trimmers and brush cutters. It’s ideal for clearing thick weeds, tall grass, and light brush, and the 320-foot spool suits high-volume users who need to reload frequently.

Fitment & Compatibility

• Line diameter: 0.155 inches (3.9 mm) – fits trimmer heads that accept this gauge. Check your trimmer’s manual or head for max/min line size; most mid-to-large gas trimmers (25cc+) and some high-end electric models work.
• Spool size: 320-foot length is for bulk refills, not pre-wound spools. You’ll need to cut and wind it manually into your trimmer head.
• Brand/model fit: Works with EGO (e.g., Power+ 56V) and many other brands (Stihl, Husqvarna, Echo, Ryobi, etc.) as long as line diameter is compatible. Not specifically designed for EGO heads, so check head design for round vs. square line clearance.
• OEM vs aftermarket: This is aftermarket (Oregon) – generally high quality, but verify your trimmer head’s line retention (some OEM heads prefer specific shapes or coatings).

Key Things to Know

• Durability: Magnum Gatorline uses a reinforced nylon core with a serrated edge design for cutting through tough vegetation, but it’s round, not square or twisted – less aggressive than some specialty lines but smoother on the head.
• Installation difficulty: Easy – just cut to length and load per your head’s instructions. The 320-foot spool is heavy; use a line winder or steady hand to avoid tangles.
• Common gotchas:
  • Not compatible with smaller electric trimmers (under 18V) that require 0.065-0.095 inch line – too thick.
  • May wear faster on abrasive surfaces (concrete, gravel) than premium twisted lines.
  • Bulk spool means you’ll need to store the rest; keep it dry to prevent brittleness.

Should You Buy It

Buy this if you have a commercial-grade or heavy-use gas trimmer (or a high-voltage electric like EGO) and need a durable, cost-effective bulk line for thick brush and weeds. Skip it if you have a light-duty electric trimmer or prefer pre-wound spools for convenience.