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Internet # 327396201

Model # RY40ST01K

Store SKU # 1010323297

40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger

$159.00
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  • More Power Than a 25cc Gas Trimmer
  • 1 Hour of Runtime Using a 40V 4Ah Battery
  • EXPAND-IT Attachment Capable – Save Money, Time, and Space
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Product Details

About This Product

The 40V 15" String Trimmer Kit delivers more power than a 25cc gas string trimmer, making it a true gas replacement without the hassle of gas. With just the pull of a trigger, trim for 1 hour using a 40V 4Ah battery. Save money, time, and space with attachment capability and transform your string trimmer into a variety of tools. This trimmer is compatible with RYOBI EXPAND-IT attachments & other universal attachments to take on any job around the yard. Trim weeds & grass with the adjustable 13" to 15" cut swath. A larger cut swath will give you maximum performance while a smaller cut swath gives you maximum runtime. This trimmer is equipped with a variable speed trigger to achieve maximum control when trimming along fences, mailboxes, and flower beds. Conveniently reload your .080" line in under 60 seconds with the REEL EASY+ SPEED WINDER bump feed head. Best of all, it is part of the RYOBI 40V system where any 40V battery works with any 40V product. This 40V 15" String Trimmer Kit is backed by the RYOBI 5-Year Manufacturer's Tool Warranty, 3-Year Manufacturer's Battery Warranty, and includes RY40PH01 40V Power Head, A54ST01 Straight Shaft Trimmer Attachment, OP40404 40V 4Ah Battery, OP404 40V Charger, Front Handle, Grass Deflector, .080" Replacement Line, and Operator's Manuals.

Highlights

  • More power than a 25cc gas string trimmer, making it a true gas replacement
  • Experience gas performance with just the pull of a trigger. No gas, no maintenance, no hassle
  • 1 hour of runtime using a 40V 4Ah battery; 119 minutes of runtime using 40V 8Ah battery (40V 4Ah battery included)
  • Attachment capability transforms your string trimmer into a variety of tools; Compatible with RYOBI EXPAND-IT attachments and other universal attachments. Save time, save money, save space.
  • Adjustable 13" to 15" cut swath for maximum performance or maximum runtime
  • Maximum control with variable speed trigger
  • Reload .080" line in under 60 seconds with the REEL EASY+ SPEED WINDER bump feed head
  • Part of the RYOBI 40V System - Any 40V Battery Works With Any 40V Product
  • 5-year manufacturer's tool warranty
  • Includes: RY40PH01 40V Power Head, A54ST01 Straight Shaft Trimmer Attachment, OP40404 40V 4Ah Battery, OP404 40V Charger, Front Handle, Grass Deflector, .080" Replacement Line, and Operator's Manuals
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Product Information

Internet # 327396201

Model # RY40ST01K

Store SKU # 1010323297

Specifications

Dimensions: H 69 in, W 11.5 in, D 10.5 in

Dimensions

Assembled Depth (in.)

10.5 in

Assembled Height (in.)

69 in

Assembled Width (in.)

11.5 in

Line Style Size

.080

Maximum Cutting Path Diameter (in.)

15 in

Recommended Line Diameter (in.)

.080 in

Shaft Length (in.)

44 in

Details

Assembly Required

Yes

Battery Amp Hours

4 Ah

Battery Run Time (min.)

60

Battery Type

Lithium Ion

Battery Voltage (V)

40V

Battery/Charger

(1) 4 Ah Battery & Charger Included

Charger Included

Charger Included

Features

Attachment Capable, Rechargeable, Zero Emissions

Head Type

Wind without Assembly

Included

Battery, No-tool Line Replacement, String

Line Advance System

Bump

Number of Total Batteries Included

1

Number of Trim Lines

2

Outdoor Power Combo

No Additional Tools

Power Type

Battery

Product Weight (lb.)

8.6 lb

Refurbished

No

Returnable

30-Day

Shaft Type

Straight Shaft

Start Type

Electric

Tools Included

Battery, Charger, String Trimmer, Trimmer Line

Trimmer Line Type

String

Trimmer Type

Stick

Warranty / Certifications

Manufacturer Warranty

5-Year Limited Tool Warranty, 3-Year Limited Battery Warranty

Questions & Answers

How long is chargeing time?
ByMay 22, 2025
1 Answer | 
Answer This Question

Hello, Joseph - Many factors impact the charge time, such as the amp-hour, condition of the battery, temperature, etc. We do not have any published figures for the charge time. We hope this helps! If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

By|May 23, 2025
    0/0


    I bought this trimmer a little over a year ago and have had to buy two replacement heads @ $ 29.99 x2 =_59.98 The head locks up and I can't get it loose to replace the string. When I do get it loose it won't go back on. Is this normal to be on the third?
    ByMay 19, 2025
    1 Answer | 
    Answer This Question

    Hello, Tomr - Thank you for the question. If you would, please contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

    By|May 21, 2025
      0/0


      What is the string made from?
      ByMay 19, 2025
      1 Answer | 
      Answer This Question

      Hello, Daniel - The trimmer line is made of plastic. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

      By|May 21, 2025
        0/0


        Need instructions for replacing string
        ByMay 18, 2025
        1 Answer | 
        Answer This Question

        Hello, Ryobi - Please see page 8 of the Use and Care manual for Line Replacement instructions: https://images.thdstatic.com/catalog/pdfImages/7c/7c8aa285-5989-493c-bb6b-a4ec51dd3bf4.pdf. We hope this helps! If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer (Tool Only) (RY40ST01B).

        By|May 20, 2025
          0/0


          I am 5'3". Is this product length adjustable?
          ByMay 17, 2025
          1 Answer | 
          Answer This Question

          Hello, Kathy - No, the length isn't adjustable. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

          By|May 20, 2025
            0/0

            (1)

            Will this work with the older expand it attachments I have with a 2 cycle gas head?
            ByMay 13, 2025
            2 Answers | 
            Answer This Question

            I have a 40V expand it string trimmer - not sure if is this exact model. I have used the electric 40V head with the older 4-cycle gas expand it string trimmer (which uses the slightly thicker string - 0.095). Works fine.

            By|May 21, 2025
              0/0

              Hello, Russell - Please see page 6 of the Use and Care manual for compatibility: https://images.thdstatic.com/catalog/pdfImages/1a/1a5012c6-e918-4565-85bc-45cebb294356.pdf. We hope this helps! If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

              By|May 14, 2025
                0/0


                I've had this for a year and needed to replace the line. I couldn't unlock the base. Looked up on YouTube on some tricks but not I can't lock it. It won't budge. Help!
                ByMay 12, 2025
                1 Answer | 
                Answer This Question

                Hello, Sharon - Thank you for the question. If you would, please contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger (RY40ST01K).

                By|May 13, 2025
                  0/0


                  Can the head be changed out to a thick brush trimmer
                  ByMay 10, 2025
                  1 Answer | 
                  Answer This Question

                  Hello, Lisa - This trimmer can utilize our REEL EASY+ 2-in-1 Pivoting Fixed Line and Bladed Head (model AC053N1FH) or our Expand-It Brush-Cutter Trimmer Attachment (model RYBRC). These options can be found on HomeDepot.com. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.800.525.2579, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://www.ryobitools.com/support/contact. This question is from RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer & Edger with 4.0 Ah Battery and Charger (RY40ST01K-RYEDG).

                  By|May 13, 2025
                    0/0


                    Viewing 1-8 of 182

                    Customer Reviews

                    4.3 out of 5

                    • 4.3 out of 1,877 reviews
                    • 86% recommend this product
                    What Customers Say
                    Summarized by generative AI from text of customer reviews

                    Customers say the Ryobi 40V string trimmer is a powerful and efficient tool that performs well for various yard maintenance tasks. Many appreciate its lightweight design and ease of use, especially compared to gas-powered models. However, some users noted that the battery life could be shorter than expected, and the string replacement process can be cumbersome. Overall, the trimmer is well-received for its performance and compatibility with other Ryobi attachments, making it a valuable addition to their gardening tools.

                    Filter by:
                    Showing 1-10 of 1,877 reviews
                    The string head broke on the 2nd use of this tool. It had bumped the side of a flower bed. A replacement is around $35
                    by
                    • Verified Purchase
                    1 found this review helpful
                    Happy customer
                    [This review was collected as part of a promotion.] Finally got to use my new Ryobi expand-it power head and string trimmer attachment . Cut my entire yard on one charge. Great product very lightweight and super quiet.
                    by
                      • Recommended
                      Received in time, everything work as intended. I am very happy with my purchase.
                      by
                      • Verified Purchase
                      Great speed and long lasting battery
                      [This review was collected as part of a promotion.] I bought this mower for my small business and it is the best thing I’ve ever bought. It has so much power and I love it,
                      by
                        • Recommended
                        Disappointed with Ryobi's Customer Service
                        I bought this product last November. I've used it several times now and have had a few issues with it. The main complaint I have is the string cutter attachment. It was already put together by the company, so we didn't fiddle with it at all, just attached it. When we started the machine up the head flew off, scaring the crap out of my husband and sending the spring into the tall grass never to be seen again. When I found the head I saw the flimsy plastic loops for attaching it had broken off. I've been trying to get it replaced but Ryobi's site is useless in this regard. I first asked customer service in an email what needed to be done. They gave me an 8 point list including registering the product and then starting a claim. Well, fine except when I try to start a claim I get an error page. I've tried several times and each time I get an error. The brush cutter works okay but is really awkward for someone my size (5'4" and 130lbs) and I can only handle it in short uses. Overall, I wish I'd bought a different product but now I'm stuck with this. I'll update this review if I ever get through to customer service at Ryobi.
                        by
                        Response from RYOBIMay 9, 2025
                        Hello, Krislyn - We’re sorry that you’ve encountered this frustration! If you would, please keep an eye on your inbox for an email from us at Reviews@RYOBItools.com. We’d value the opportunity to connect so we can fix this! RYOBIOutdoorTools
                          Worst Ryobi I’ve ever bought
                          It overheated within the first 10 minutes of using it and got so hot it MELTED the plastic grip on the pole, something it’s right with it, it also cut out every 5 seconds and when it got going it destroyed everything in front of it and then the grip started slipping and that when I noticed the shafts was hot, the grip was melting and noticed smoke coming from the trimmer. I’m literally writing this as I’m waiting for it to cool so I can throw it in my truck and return it… I can’t believe this happened
                          by
                          Response from RYOBIMay 5, 2025
                          Hello, HomeDepotCustomer - Please email us at Reviews@RYOBItools.com. We'd like to discuss your feedback further. RYOBIOutdoorTools
                            2 found this review helpful
                            If you like wasting time with the trim line and fighting 30+ minutes to get the cap back back on this is the product for you.
                            I've owned this Piece of Junk for over a year now and have hated every minute of using it. Weed wackers is terrible with having to change the trim line regularly. This product is what happens when an electric car driving college engineer designs a piece of equipment for the outside. Something the engineers probably haven't seen. This weed wackers is counter intuitive. When you change a drill bit head you have a lock to stop the head from spinning so you can secure the bit. This weed wackers required you to fight a counter thread that wants to spin in the direction your turning it. There is no lock. So it requires extra tools to lock the top in place so you can screw the the thread holder back on. Cursing will ensue as you try to work against poor engineering choices. It often requires two people for a one person job. Absolutely hate this thing.
                            by
                            Response from RYOBIApr 28, 2025
                            Hello, Davemert - We're sorry to hear about the frustration you've experienced with your trimmer. And we'd like to discuss your experience further and see if we can turn it into a positive one. If you would, please keep an eye on your inbox for an email from us at Reviews@RYOBItools.com. RYOBIOutdoorTools
                              4 found this review helpful
                              Great features and tremendous power…thanks Ryobi!
                              [This review was collected as part of a promotion.] Just purchased the RYOBI 40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger and used it immediately. Easy-to-assemble and even to easier to operate. I also enjoy Ryobi’s mobile app, so easy to register the product and search for additional equipment. My only concern is it needs to come with an attachable shoulder harness to balance the weight. I searched the mobile app as well as the store where the product was purchased. I’ve not been able to locate a harness made for the string trimmer. Hoping Support can help me solve the problem.
                              by
                                • Recommended
                                My grass is always perfect
                                [This review was collected as part of a promotion.] My garden now has a more beautiful, greener and more charming lawn after I purchased the Attachment Capable String Trimmer Kit to clean my grass. This product is incredible, it cuts your grass and still leaves it with unique and perfect finishes.
                                by
                                  • Recommended
                                  Highly recommended
                                  [This review was collected as part of a promotion.] And Ryobi weed eater. It's so much more powerful and dependable than most gas weed eaters
                                  by
                                    • Recommended
                                    Showing 1-10 of 1,877 reviews

                                    40V 15 in. Expand-It Cordless Battery Attachment Capable String Trimmer with 4.0 Ah Battery and Charger

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