Ryobi 40V HP Brushless String Trimmer Review

string trimmer ergonomics
PTR Review
  • Pro Review 9.4

If you want the weight reduction and power Ryobi offers in its carbon fiber string trimmers, you now have two options. This model, with its 17-inch cutting swath, offers you the best of everything at a premium price point. If you don't need a more aggressive tool, we recommend sticking with the 15-inch RY40290 model. For those with larger acreage to maintain or who have tough, tall grasses to tame, the 17-inch RY402110 provides the (gas-like) power you need.

Overall Score 9.4 (out of 10)

Ryobi 40V HP Brushless String Trimmer with Carbon Fiber Shaft Boosts Power

Battery-powered string trimmers have been an easy transition for more homeowners with options that have excellent performance and runtime. However, properties that need more than a 25cc engine can offer have been short on options. We tested the 17-inch Ryobi RY402110VNM 40V HP Brushless string trimmer with carbon fiber shaft to see if it’s ready for those tougher properties.

Editor’s Note: Check out our best string trimmer article to see our top picks.


  • Above-average cutting power
  • Over an hour of runtime in high speed!
  • Carbon fiber shaft reduces overall weight
  • Low felt vibration
  • Tool-free front handle adjustment


  • Heavier than many battery-powered models
  • Expensive

Ryobi 40V HP Brushless String Trimmer Design Notes


While not the first string trimmer with a carbon fiber shaft, we love how this feature lightens the load for the Ryobi RY402110VNM. It has the net effect of reducing the weight to less than 9 pounds as a bare tool and less than 13 pounds with a stout 6.0Ah battery inserted. The tool may not prove a good fit for those short of stature as it measures just over 72 inches from the head to the back of the tool. Add a few more inches when you slide on a battery.

Ryobi string trimmer carbon fiber shaft

The brushless motor on the head is substantial, but it balances the tool well during use. You can use the tool-free adjustable front handle to quickly dial in the pivot point to help you get better balance while trimming grass.

Ryobi 40V carbon fiber string trimmer

Even with all of that, this Ryobi 40V brushless string trimmer weighs a bit more than many models in its class. If you want to decrease the weight a little—at the sacrifice of runtime—you can always use a 4.0Ah battery. If you don’t need 45 minutes to an hour of actual trimming we see no reason to carry the extra weight around!

Changing Out Line on the Ryobi 40V Brushless String Trimmer

The bump-feed head on the Ryobi 40V carbon-fiber brushless string trimmer loads quite easily. That might be why it bears the “Reel Easy” name.

To refill the line, spin the green bump head until the arrows line up with the black portion. Next, thread your replacement line through the head so that equal amounts are sticking out. We use around 8 feet of line, but it will take up to 10 feet.

The last step has you spin that top section clockwise to load it all up until about 6-inches stick out from each side. We found we were back up and running in less than a minute. You can speed up the entire process using the speedwinder—a handle that fits overtop the green bump head.

string trimmer bump head

In addition to the speed winder, Ryobi includes a second trimmer head. It can use either fixed line or plastic blades to give you the option of cutting thicker weeds or reedy grasses. You lose the advantage of the bump-feed but gain enhanced cutting capability. The plastic blades have more mass than line that cuts tougher grasses that traditional string might just cause to bend as it passes overtop.

Ryobi RY402110VNM Additional Features

  • Variable speed trigger
  • Not attachment capable
  • Compatible with all Ryobi 40V batteries
  • 75 other tools available in the 40V lineup

Ryobi 40V HP Brushless Carbon Fiber String Trimmer Performance

Compared to the RY40290 (Ryobi’s 15-inch HP brushless model), the Ryobi 40V HP brushless motor in this string trimmer produces noticeably better results. It simply has more power.

Ryobi 40V HP brushless string trimmer review

The Ryobi RY402110VNM can run anything from 0.080 to 0.105-inch line. The 40V 15-inch trimmer maxes out with 0.95-inch line. This string trimmer also offers some flexibility—running either a 15-inch or 17-inch cutting swath. You just fust flip the cutter around to switch between the two diameters.

Editor’s Note: Some users may wonder why manufacturers would offer a smaller diameter cutting option. A smaller diameter cutting swath typically increases run time at the expense of the cutting path width. If you tend to edge in a way that doesn’t require a full 17-inches, reducing your width lets you accomplish more on a single battery (or a smaller battery).

We trimmed around our 2600-square-foot shop and office. We could instantly notice the increased performance. This trimmer even cuts confidently at Low speed—so much so that we felt it did a better job than some other string trimmers at full speed.

Ryobi 40V HP string trimming

We then bumped the trimmer up to High speed. At high-speed everything simply went faster. We could tackle thicker grasses—including dense patches of St. Augustine without any noticeable hesitation. While Ryobi doesn’t say it, we feel this string trimmer behaves very much like a 25cc gas trimmer—perhaps even better.

Felt Vibration

When we tested some of the first Ryobi battery-powered string trimmers, they produced a lot of vibration. Now, with both the carbon fiber shaft and the improved balance, we find that the Ryobi 40V HP Brushless 17-inch string trimmer really runs much more smoothly!

Clocking Runtime

Due to variances with lawns, moisture, etc—we tend to run a baseline no-load runtime test on all string trimmers. This Ryobi 40V HP brushless string trimmer drops runtime a bit with that larger 17-inch cutting swath. Still, that additional power and diameter let you work more quickly—so we have more than simple mth to consider here.

In the kit, you get a 6.0Ah battery with the Ryobi RY402110 trimmer. They also pre-load 0.095-inch line—which we used for our runtime testing. Given that combination, we ran the string trimmer for 1 hour and 5.5 minutes. If you run 0.105-inch line, expect to see that runtime number drop. From our perspective, this trimmer has impressive runtime—testing higher than many Pro-focused models.

Ryobi 40V 6Ah battery pack

The Ryobi rapid battery charger included in the kitted version of this trimmer recharges the 6Ah battery pack in under an hour.

Whisper Series Means Low Noise

As you might expect with a member of the Ryobi Whisper Series of tools, this string trimmer runs very quietly compared to many other modes. Ryobi claims 60% less noise than gas. Testing at our operator’s ear, we measured 84 dBA at Low speed and 87 dBA at High.

Ryobi 40V HP Brushless Carbon Fiber String Trimmer Price

The Whisper Series Ryobi RY402110 serves as the company’s flagship string trimmer. Consequently, it carries a higher price. As a kit with a 6.0Ah battery and rapid charger expect to pay around $299. Look for it at your local Home Depot or on homedepot.com.

Ryobi also backs this string trimmer with a 5-year tool warranty and 3-year battery warranty.

The Bottom Line

If you want the weight reduction and power Ryobi offers in its carbon fiber string trimmers, you now have two options. This model, with its 17-inch cutting swath, offers you the best of everything at a premium price point. If you don’t need a more aggressive tool, we recommend sticking with the 15-inch RY40290 model. For those with larger acreage to maintain or who have tough, tall grasses to tame, the 17-inch RY402110 provides the (gas-like) power you need.


  • Model: Ryobi RY402110VNM
  • Power Source: Ryobi 40V battery
  • Cutting Swath: 15 or 17 inches
  • Line Diameter: 0.080 to 0.105-inch
  • Weight: 8.8 lbs bare, 12.9 lbs with a 6.0Ah battery
  • Length: 72 1/4 inches

Check out Ryobi’s entire 40V lineup here .

Related articles

Ryobi 40V Backpack Battery System Review

Extend Your Runtime With The Ryobi 40V Backpack Power Supply In the past few years, Ryobi has made a noticeable performance jump with its 40V lawn care lineup. In 2022, the brand designed a few unexpected innovations, like a joystick-controlled zero-turn. We wondered whether Ryobi was going to target the professional market, and we’re getting […]

Ryobi 40V HP Brushless Blower Vacuum

Ryobi 40V Jet Fan Blower Also Includes a Vacuum Function Shoveling leaves into garbage bags might just be one of the worst parts of fall cleanup. Luckily, Ryobi has a product that encompasses the whole leaf-cleanup process, from blowing to vacuuming, to mulching. To sweeten the pot, it’s all done in one machine that transforms […]

Greenworks 60V Edger Review

Greenworks 60V Edger Gives Your Lawn a Little Off the Sides When given the option of an attachment system or dedicated tools, some prefer the flexibility of the former. When it comes to an edger, however, we prefer a dedicated tool. Greenworks happens to have both options. Testing the standalone Greenworks 60V edger gave us […]

Ryobi 40V HP Brushless Hedge Trimmer Review

Ryobi 40V HP Brushless Cordless Hedge Trimmer Provides Impressive Capacity While Ryobi has a ton of homeowner- and DIY-targeted products, one area that it has been diving head-first into lately is high-performance cordless OPE. The brushless, 26-inch Ryobi 40V Hedge Trimmer joins the brand’s Whisper Series with familiar features and eyebrow-raising performance. We got it […]

Notify of

Inline Feedbacks
View all comments
Would love your thoughts, please comment.x