Best Ryobi 40V Attachment-Capable String Trimmer
As an Amazon Associate we earn from qualifying purchases.
A ryobi 40 volt lithium ion cordless attachment capable string trimmer is a Ryobi 40V string trimmer whose listing says it accepts Expand-It attachments, so one 40V battery can run the trimmer and attachments that fit the system. Five Ryobi listings in the search results state that capability. Two include a 4.0 Ah battery and charger in the box, two are sold as tool only, and one does not say what comes in the box. Check the box contents before you order.
Quick answer
- Five Ryobi 40V string trimmers in the results state Expand-It attachment capability in the listing text we read.
- Two listings include a 4.0 Ah battery and charger, two are tool only, and one does not state what is included.
- Two listings state runtime: up to 71 minutes on a 40V 4Ah battery, and over 45 minutes on a 40V 4Ah battery. The listings do not compare them directly.
What attachment capable means on these listings
On these listings, attachment capable means the trimmer works with Ryobi’s Expand-It attachment system. The 4.0 Ah kit listing says the trimmer works with RYOBI Expand-It attachments. The 15 inch bare tool listing says it is EXPAND-IT attachment capable and says that saves time, money and space. The carbon fiber model listing makes the same attachment statement in its bullets.
None of the five listings names a specific attachment in the text we read. The listings tell you the trimmer is part of the system, but they do not say which attachments fit each model. Check the attachment’s own listing against the trimmer’s stated system before you buy an attachment, because this post makes no claim about any single attachment.
One bullet on the 4.0 Ah kit says the 40V line works with any RYOBI 40V battery, across more than 75 40V tools. That statement comes from the listing and refers to the battery platform. It does not tell you which attachment you can add to the trimmer.
Stated specs at a glance
The table lists only the figures each listing states. A cell that says not stated means the captured listing text does not give that figure.
| Listing | Attachment | Battery in box | Cutting width | Runtime stated | Power comparison |
|---|---|---|---|---|---|
| 4.0 Ah kit (Open Box label) | works with Expand-It attachments | 4.0 Ah battery and charger included | not stated | not stated | not stated |
| 15 in bare tool | EXPAND-IT attachment capable | sold separately | 15 in (title) | up to 71 minutes on 40V 4Ah | more than a 21cc gas trimmer |
| Adjustable 13 to 15 in, RY40ST01B | Expand-It attachment capable (title) | not included (title) | adjustable 13 to 15 in (title) | not stated | not stated |
| 4.0 Ah kit (second listing) | attachment capable (title) | 4.0 Ah battery and charger included (title) | not stated | not stated | not stated |
| 16 in carbon fiber shaft | EXPAND-IT attachment capable | not stated | 16 in (title) | over 45 minutes on 40V 4Ah | more than a 27cc gas trimmer |
Product by product
The sections follow the order of the table. Each one gives the figures its listing states and a note on what the listing leaves out.
RYOBI 40-Volt Attachment Capable String Trimmer with 4.0 Ah Battery and Charger Included
This is the listing to look at if you want the battery and charger in the box together with the Expand-It attachment capability. The listing says the trimmer works with RYOBI Expand-It attachments, has a variable speed trigger for cutting control, and is recommended for yards up to 1-Acre. Its bullets also say the battery works with the wider RYOBI 40V line.
The title carries an Open Box label, while a bullet says Brand New in box. The captured text does not reconcile the two, so this post takes the box contents from the title and does not rely on the condition wording.
- Brand: RYOBI (listing)
- Battery and charger: 4.0 Ah battery and charger included (title)
- Attachment: works with RYOBI Expand-It attachments (listing)
- Speed control: variable speed trigger (listing)
- Yard size: recommended for yards up to 1-Acre (listing)
- Cutting width, runtime and weight: not stated
Skip it if the condition wording on the listing matters to you, because the listing gives two different condition statements.
RYOBI 40V Attachment Capable 15″ String Trimmer, Bare Tool
This is a bare tool, and its title says the battery and charger are sold separately. A working kit therefore depends on whether you already own a 40V Ryobi battery and charger. The bullets say runtime is up to 71 minutes on a 40V 4Ah battery and that the trimmer is EXPAND-IT attachment capable.
The listing compares its power with a 21cc gas trimmer and calls the unit a gas replacement. That comparison is the listing’s own claim, and the listing gives no method behind it.
- Brand: RYOBI (listing)
- Cutting width: 15 in (title)
- Battery and charger: sold separately (title)
- Runtime: up to 71 minutes on a 40V 4Ah battery (listing)
- Attachment: EXPAND-IT attachment capable (listing)
- Power: more than a 21cc gas trimmer (listing)
- Weight and shaft: not stated
Skip it if you need the battery and charger in the box, because this listing sells them separately.
RYOBI 40-Volt Expand-It Adjustable 13-15 in String Trimmer, Tool Only
This is the adjustable-width option in the group. Its title gives a cutting width that adjusts from 13 to 15 inches, names the Expand-It attachment capability, and gives the model number RY40ST01B in black. The title also says the tool is sold with the battery and charger not included.
The text captured for this listing contains only the title and brand, so runtime, weight and shaft details are not stated in this post. The title is the only source for the width and attachment statements.
- Brand: RYOBI (listing)
- Attachment: Expand-It attachment capable (title)
- Cutting width: adjustable from 13 to 15 in (title)
- Model: RY40ST01B, black (title)
- Battery and charger: not included (title)
- Runtime, weight and shaft: not stated
Skip it if you need runtime or weight figures before you buy, because the captured text for this listing does not give them.
RYOBI Attachment Capable String Trimmer, 4.0 Ah Battery and Charger Included
This is the second listing that puts a 4.0 Ah battery and charger in the box. Its title names it a RYOBI 40-Volt lithium-ion cordless string trimmer, says it is attachment capable, and gives the 4.0 Ah battery and charger as included. The single bullet captured says the product ships with all relevant accessories.
Beyond the title and that bullet, the captured text gives no runtime, cutting width, weight or shaft figures. The listing does not name a particular attachment in the captured text.
- Brand: RYOBI (listing)
- Battery and charger: 4.0 Ah battery and charger included (title)
- Attachment: attachment capable (title)
- Accessories: ships with all relevant accessories (bullet)
- Runtime, cutting width, weight and shaft: not stated
Skip it if you need specs beyond the title, because the captured text for this listing has little beyond the title.
16″ Carbon Fiber Shaft String Trimmer with 40V HP Brushless Motor
This is the only carbon fiber shaft trimmer in the group. The title gives a 16 inch cutting width, a carbon fiber shaft and a 40V HP brushless motor. The bullets say the trimmer is EXPAND-IT attachment capable and runs over 45 minutes on a 40V 4Ah battery.
The listing says the trimmer delivers more power than a 27cc gas trimmer. The bullets do not say whether a battery or charger is in the box, so check the order details before you buy.
- Brand: RYOBI (listing)
- Motor: 40V HP brushless (title)
- Shaft: carbon fiber (title)
- Cutting width: 16 in (title)
- Runtime: over 45 minutes on a 40V 4Ah battery (listing)
- Attachment: EXPAND-IT attachment capable (listing)
- Power: more than a 27cc gas trimmer (listing)
- Battery and charger, weight: not stated
Skip it if you need the box contents stated on the listing, because the bullets read for this post do not say whether a battery and charger come with it.
If your next purchase is a 40V Ryobi hedge trimmer, see our Ryobi 40 volt cordless hedge trimmer page. For extension-pole models that reach higher than a string trimmer does, read our cordless hedge trimmer with extension pole page.
Which listing fits which buyer
Your battery situation sorts the five listings more clearly than any single spec does. If you have no 40V Ryobi battery yet, the two kits are the only listings that state a battery and charger in the box. If you already own the battery and charger, the bare tools make more sense, because you avoid paying for a second set.
- No battery yet: the 4.0 Ah kit with the Open Box title, or the second 4.0 Ah kit, since both state the battery and charger as included.
- Already own a 40V Ryobi battery: the 15 inch bare tool, which states the most specific runtime, or the adjustable 13 to 15 inch tool.
- Need a fixed reach or a particular width: the 16 inch carbon fiber model for width and shaft, or the adjustable listing if you want a range rather than one size.
If runtime is the deciding factor, the 15 inch bare tool has the higher figure in this group, but its runtime is up to 71 minutes and the carbon fiber model’s is over 45 minutes, so the two figures are not a like-for-like comparison.
Battery and box contents
The battery question decides most of the cost on this list. Two listings include a 4.0 Ah battery and charger, two are tool only, and one does not state what is in the box. A bare tool is a reasonable buy only if you already own a compatible 40V Ryobi battery and a charger.
Three listings name a 4.0 Ah battery. The two kits include it, and the carbon fiber model names a 40V 4Ah battery for its runtime figure without saying whether that battery is included. The battery capacity is the listing’s own figure, reported as stated.
Where a listing gives a runtime, it names the battery behind the figure. The 71 minute figure for the 15 inch bare tool and the over 45 minute figure for the carbon fiber model both name a 40V 4Ah battery. Those are the listings’ figures, and the listings do not say how they were produced.
If you already own a Ryobi 40V battery, the wider-line bullet on the 4.0 Ah kit is the statement to read for compatibility. It covers the battery platform and says nothing about a specific attachment.
Buying checklist
- Confirm the box contents first. Two kits include a battery and charger, two are tool only, and one does not say.
- Match the Expand-It capability to the attachment you plan to use, and check that attachment’s own listing.
- Compare runtime figures only between listings that name the same battery, which here is a 40V 4Ah battery.
- Choose the cutting width you need: 15 inches, an adjustable 13 to 15 inches, or 16 inches on the carbon fiber model.
- Decide whether a carbon fiber shaft matters to you, since only one listing states it.
Mistakes to avoid
- Assuming a bare tool includes a battery. The 15 inch listing says the battery and charger are sold separately, and the adjustable listing says they are not included.
- Reading the Open Box label as a change to the trimmer. The bullets describe the trimmer, and the condition wording is the listing’s own.
- Setting the 71 minute and over 45 minute runtimes side by side as a ranking. Both name a 40V 4Ah battery, but the listings do not explain the difference between them.
How we chose
We ran the keyword search and read the first three results pages. We kept Ryobi-branded 40V string trimmers whose listing states Expand-It attachment capability, and we read the title and bullets of each one that qualified. We left out 25cc gas trimmers that carry the attachment label, 18V trimmers, Expand-It attachments sold on their own, hedge trimmers, a leaf blower and trimmer combo kit, and Greenworks and Worx 40V trimmers.
We read five listings on 2026-10-22. We did not rank them. The table shows only the figures each listing states, and a blank cell means the captured text does not give that figure.
What we could not verify
We could not verify that any of these trimmers works with a particular Expand-It attachment. The listings say the trimmer is attachment capable, and this post repeats that statement without checking any attachment against it. We could not verify runtime, cutting performance or line feed for any model.
Two runtime figures come from listings that name a 40V 4Ah battery, and the post reports both as stated. The listings do not explain how the figures were produced, so this post does not treat either one as a comparison result.
What the sources do not say
The listings do not name the Expand-It attachments that fit each trimmer. Only two listings state a runtime, and none of the five states a weight. The captured text for the adjustable 13 to 15 inch listing has no bullet points, so its runtime, weight and shaft details are missing from this post.
The 4.0 Ah kit is labelled Open Box in its title and described as Brand New in box in a bullet. The listings do not say which condition applies, and this post does not choose between them. Two listings say a battery is included in the title, and the carbon fiber model does not say either way.
FAQ
Do these Ryobi trimmers include a battery and charger?
Two of the five include a 4.0 Ah battery and charger, according to their titles. The 15 inch bare tool sells the battery and charger separately, and the adjustable 13 to 15 inch listing is tool only. The carbon fiber model does not say what is in the box.
What does attachment capable mean on these listings?
The listings say the trimmer works with RYOBI Expand-It attachments. They do not list each attachment, so check the attachment’s own listing before you buy it.
How long does the battery run the trimmer?
Two listings state runtime. The 15 inch bare tool gives up to 71 minutes on a 40V 4Ah battery, and the carbon fiber model gives over 45 minutes on a 40V 4Ah battery. The listings do not explain how these figures were produced.
Can I use any Ryobi 40V battery?
One bullet on the 4.0 Ah kit says the 40V line works with any RYOBI 40V battery. The other listings do not make that statement in the text captured, so read the battery line on the listing you choose before you order.
Is a carbon fiber shaft better than a standard shaft?
The listings do not compare shaft types. The carbon fiber model is the only one in the group that states a carbon fiber shaft, and no listing gives a weight that would allow a comparison.
Should I choose a Ryobi 40V trimmer or a gas trimmer?
Some listings say their trimmer has more power than a 21cc, 25cc or 27cc gas trimmer. Those are the listings’ own comparisons, and the listings do not describe a method. This post does not rank the two types.
Bottom line
If you already own a 40V Ryobi battery and charger and want the Expand-It system, buy the bare tool whose listing states the cutting width and runtime you need; if you do not own them, choose one of the two kits that state a battery and charger in the title.
Sources
- RYOBI 40-Volt Lithium-Ion Cordless Attachment Capable String Trimmer with 4.0 Ah Battery and Charger Included (opened 2026-10-22)
- RYOBI 40V Attachment Capable 15″ String Trimmer Bare Tool (opened 2026-10-22)
- RYOBI 40-Volt Lithium-Ion Cordless Expand-It Attachment Capable Adjustable 13-15″ String Trimmer, Tool Only (opened 2026-10-22)
- RYOBI Trimmers 40-Volt Lithium-Ion Cordless Attachment Capable String Trimmer, 4.0 Ah Battery and Charger Included (opened 2026-10-22)
- 16″ CARBON FIBER SHAFT STRING TRIMMER WITH 40V HP BRUSHLESS MOTOR BY RYOBI (opened 2026-10-22)
