While it goes by many names (see weed eater, weed whacker, grass-cutting thingy, etc.), nothing puts the beautiful finishing touches on your yard quite like a string trimmer. One of the most popular and dependable weed eater brands out there is Ryobi. If you own a Ryobi weed whacker, you’ll want to make sure you have extra spools of Ryobi trimmer line on hand, so you never miss a week of upkeep. In order to do that, you’ll need to know the specific string size your Ryobi trimmer needs.

Read on to find out the different string sizes you may need depending on the Ryobi trimmer that you have.

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Ryobi Battery Weed Eater String Sizes

So what size string is required for a Ryobi weed eater?

When it comes to lawn care (and lawn tools), specific measurements matter. This is true when it comes to calculating nitrogen lawn fertilizer, distributing grub killer and also when it comes to the size of trimmer line you use. When it comes to picking the right weed eater string size for your Ryobi tool, there are a few things to consider. Specifically, Ryobi cordless weed eater string sizes vary depending on how it’s powered, the attachments it has and specific model of Ryobi trimmer you own.

For instance, the base model Ryobi String Trimmer/Edger is meant for much smaller yards and isn’t compatible with a heavy-duty trimmer line. The Ryobi lithium-ion and brushless string trimmer/edgers are meant for more grass whacking, which means a thicker string size is in order. Some only allow for a specific string size, while others are compatible with multiple sizes.

ryobi weed eater string size

Ryobi 18V Weed Eater String Sizes

So, what size string does a Ryobi 18v weed eater use? See the recommendations (in inches) on Ryobi 18v weed whacker string sizes below:

RYOBI Specifications
String Trimmer/Edger String Size
RYOBI 18V ONE+ String Trimmer/Edger 0.065”
RYOBI 18V ONE+ Cordless String Trimmer/Edger 0.065”
RYOBI 18V ONE+ 10″ String Trimmer/Edger 0.065”
RYOBI 18V ONE+ 13” String Trimmer/Edger 0.080”
RYOBI 18V ONE+ Lithium-Ion Cordless Electric String Trimmer/Edger 0.080”
RYOBI 18V ONE+ HP Brushless String Trimmer/Edger 0.080”
RYOBI 18V ONE+ HP Brushless Whisper Series 15” String Trimmer 0.080” – 0.095”

👉 BUY – Trimmer String for Ryobi Weed Eater .065” Spool Replacement

👉 BUY – Trimmer String for Ryobi Weed Eater .080” Spool Replacement

👉 BUY –  Trimmer String for Ryobi Weed Eater .095” (Spiral Line)

👉 BUY –  0.095” Trimmer Round Line Replacement

Ryobi 40V Weed Eater String Sizes

What size string does a Ryobi 40v weed eater use? See Ryobi 40 volt weed eater string size recommendations (in inches) below:

RYOBI Specifications
String Trimmer/Edger String Size
RYOBI 40V 12″ Cordless Battery String Trimmer 0.065” – 0.080”
RYOBI 40V Expand-It Cordless Battery Attachment Capable String Trimmer 0.080”
RYOBI 40V Attachment Capable 15″ String Trimmer 0.080”
RYOBI 40V HP Brushless Carbon Fiber Attachment Capable String Trimmer 0.080” – 0.095”

👉 BUY – Trimmer String for Ryobi Weed Eater .065” Spool Replacement

👉 BUY – Trimmer String for Ryobi Weed Eater .080” Spool Replacement

👉 BUY –  Trimmer String for Ryobi Weed Eater .095” (Spiral Line)

👉 BUY –  0.095” Trimmer Round Line Replacement

Ryobi Gas Weed Eater String Sizes

Gas trimmers in both 2-cycle and 4-cycle shaft iterations and fewer and fewer on the market these days as manufacturers lean toward cordless, battery models. That being said, Ryobi Gas weed trimmers still exist. Thankfully, most Ryobi bump feed trimmers utilize the same weed eater string size.

Ryobi 2 Cycle Weed Eater String Sizes

With the power generated from a gas/oil engine, thicker string is usually required. Here are recommendations for gas-powered Ryobi 2 Cycle weed eater string sizes:

RYOBI 2 Cycle String Trimmer Specifications
String Trimmer/Edger String Size
RYOBI 2 Cycle Full Crank Attachment Capable Straight Shaft String Trimmer 0.095”
RYOBI 2 Cycle Full Crank Attachment Capable Curved Shaft String Trimmer 0.095”

👉 BUY –  Trimmer String for Ryobi Weed Eater .095” (Spiral Line)

👉 BUY –  0.095” Trimmer Round Line Replacement

Ryobi 4 Cycle Weed Eater String Sizes

Similar to the 2 Cycle engines, here are the Ryobi 4-Cycle weed eater string sizes:

RYOBI 4 Cycle String Trimmer Specifications
String Trimmer/Edger String Size
RYOBI 4 Cycle Attachment Capable String Trimmer 0.095”

👉 BUY –  Trimmer String for Ryobi Weed Eater .095” (Spiral Line)

👉 BUY –  0.095” Trimmer Round Line Replacement

Ryobi battery weed eater string sizes

So, What Size String for a Ryobi Weed Eater?

Ultimately, to keep your grass looking just the way you want, you’ll want to check your specific model of Ryobi weed whacker to make doubly sure you buy a replacement trimmer spool that is compatible. More often than not, though, a string size between .065 and .095 inches will be the right call for your lawn project!

If you’re interested in other lawn tools that can help your lawn to look its best, such as a Sun Joe dethatcher/scarifier, check out some of the other lawn and grass articles on our blog! If you have any questions of comments on Ryobi weed eater string sizes then leave them in the comments below!