Arnold MTD Genuine Parts .155-Inch Wheeled String Trimmer Replacement Cutting Lines, Original Version

What It Is

This is a pack of .155-inch diameter replacement trimmer lines designed for wheeled string trimmers, commonly used for edging and trimming along driveways, sidewalks, and lawns. It’s the original version from Arnold, intended for medium-duty residential trimming.

Fitment & Compatibility

Before buying, check your trimmer’s line diameter requirement—this .155-inch line fits most standard wheeled trimmers that accept .155-inch or .160-inch line. Confirm your trimmer model (e.g., MTD, Troy-Bilt, Cub Cadet) and that it uses a bump-feed or fixed-line head. Measure the existing line diameter with a caliper if unsure—using a thicker line than specified can damage the head or motor. This is OEM for many MTD-branded wheeled trimmers, but not universal for all brands.

Key Things to Know

• Quality: .155-inch line is durable for grass and light weeds but may snap on heavy brush or rocks. It’s a good balance between strength and flexibility.
• Installation: Easy to install—cut to length (typically 10–12 feet per spool) and feed into the trimmer head per your model’s instructions. No tools needed.
• Common gotchas: This line is pre-wound on spools for some heads, but on others you’ll need to wind it manually. Check if your trimmer head requires a specific winding direction (usually clockwise). Also, avoid buying if your trimmer requires .095-inch or .130-inch line—this is thicker.
• Durability: Expect 2–4 uses per spool under normal residential trimming. The line wears faster on abrasive surfaces like concrete.

Should You Buy It

Buy this if you have a wheeled string trimmer from MTD or a compatible brand and need a reliable, affordable replacement line for routine lawn edging and trimming. It’s not for heavy-duty commercial use or trimmers requiring thinner line.