Echo 306105055 1/2 Lb Donut .105 X-Fire for

What It Is

The Echo 306105055 is a 1/2-pound donut-style trimmer line spool pre-wound with .105-inch X-Fire line, designed for Echo gas string trimmers that use a speed-feed or fixed-line head with a donut spool.

Fitment & Compatibility

• Check your trimmer head type: This spool only fits Echo trimmers with a donut-style spool (not bump-feed or universal heads). Common compatible models include the SRM-225, SRM-230, SRM-260, SRM-2620, and PAS series with speed-feed heads.
• Line diameter: .105-inch X-Fire is a heavy-duty line. Make sure your trimmer can handle this thickness—check the manual for max line diameter. Most Echo trimmers with a .095 or .105 head work, but some lower-power models may bog down.
• OEM vs aftermarket: This is OEM Echo—guaranteed fit and quality. Aftermarket donuts often have slightly different hub dimensions or line length, leading to feeding issues.
• Measurement: The spool outer diameter is ~3 inches; inner hub diameter is ~0.75 inches. Verify your head accepts these dimensions.

Key Things to Know

• Quality: X-Fire line is Echo’s premium, twisted, square-shaped line—cuts better than standard round line and lasts longer.
• Installation: Very easy—just drop the donut into the spool housing, thread the line through the exit hole, and you’re done. No winding required.
• Common gotcha: Don’t over-tighten the spool cap—it can crack. Finger-tight only.
• Line length: The 1/2-pound spool gives about 25 feet of line, enough for several reloads on most trimmers.

Should You Buy It

Buy this if you own a compatible Echo trimmer and want a no-hassle, drop-in spool with premium cutting performance. It’s a solid value for heavy-duty trimming, and the OEM fit eliminates guesswork. Skip it if your trimmer uses a different head type or if you prefer a lighter .080 line for light-duty work.