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21 in. 40-Volt Brushless Lithium-Ion Cordless SMART TREK Self-Propelled Walk Behind Mower with 6.0Ah Battery and Charger

  • SMART TREK Self-Propelled Technology Adapts to Walking Speed
  • Brushless Motor and 6.0 Ah Battery for Maximum Power and Runtime
  • Features 21 Inch Durable Steel Deck
  • See More Details

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Product Overview

Experience the Cordless Revolution

GAS-LIKE POWER. CORDLESS CONVENIENCE.

RYOBI 40V Lithium tools deliver superior run time and performance that provide freedom from gas-powered lawn and garden equipment

See why RYOBI is the #1 Cordless Mower Brand

#1 CORDLESS MOWER BRAND

Based on TraQline 2018 Dollar Brand Share Sales Data for Walk-Behind Cordless Mowers in the U.S.

40+ Tools All Powered by the Same Battery

ONE SYSTEM. 40+ TOOLS.

Now over 40 innovative products in the 40V Lithium family that can be powered by any RYOBI 40V Lithium-Ion battery

Technology that Adapts

SMART TREK SELF-PROPELLED TECHNOLOGY

SMART TREK Self-Propelled Technology intelligently and intuitively adjusts to your walking speed for a superior mowing experience

Efficient Power

INTELLIGENT BRUSHLESS MOTOR

This mower's intelligent brushless motor automatically adjusts power to deliver consistent performance and GAS-LIKE POWER

Save Space

COMPACT STORAGE

Quick-release folding handle collapses this mower in seconds for super compact, vertical storage

Extended Run Time

HIGH-CAPACITY BATTERY

This super high-capacity 40V battery delivers up to a half-acre run time with incredible power and performance

Comparable Power to Gas Products

GAS-LIKE Power

Comparable Power to Gas Products

Get More Done on One Charge

Extended Run Time

Get More Done on One Charge

Full Power Until the End of the Charge

Fade-Free Performance

Full Power Until the End of the Charge

All Compatible with Ryobi 40V Batteries

40+ Tools

All Compatible with Ryobi 40V Batteries

Buy with Confidence

90 Day Money Back Guarentee

Buy with Confidence

5 Years Covered Under Warranty

5-Year Limited Waranty

5 Years Covered Under Warranty

RYOBI is leading cordless innovation with the introduction of the RYOBI 40-Volt 21 in. SMART-TREK Self-Propelled Mower. This self-propelled mower features SMART TREK technology that adapts to the user's walking speed and has rear wheel drive for increased traction when mowing your yard. The brushless motor delivers gas-like power combined with load sensing technology that detects and delivers the power needed to maintain an optimal cutting speed, resulting in maximum power and run time. Featuring a 21 in. durable steel deck, this mower was redesigned with a 7-position single-point height adjustment (ranging from 1-1/2 in. - 4 in.) that allows you to select your mowing height with one single motion. Choose which mowing option is best for you with the 2-in-1 mulching or bagging capability, or the side discharge accessory sold online. When the job is done, simply remove the Easy-Lift Single-Motion lock and release bagger to empty your grass and place back down to easily lock it back into place. The collapsible step-to-release handles offer a variety of storage options for compact spaces. The 6.0 Ah 40-Volt Lithium Ion high capacity battery offers extended run time, and is compatible with all RYOBI 40-Volt tools. Backed by a 5-year warranty.
  • SMART TREK technology adapts to the users walking speed for ease of use
  • Rear-wheel drive for increased traction
  • Brushless motor for maximum power and run time
  • 6 Ah battery for extended run time
  • Push button for hassle free starting
  • Easy-Lift Single-Motion lock and release bagger for easy debris removal
  • Step-to-Release folding collapsible handles for compact storage
  • 7- Position single-point height adjustment (1-1/2 in. - 4 in.)
  • High intensity LED headlights
  • 2-in-1 mulching and bagging capable (side discharge accessory sold separately)
  • On-board battery storage compartment for quick battery exchange
  • Includes 40-Volt 6Ah battery for extended runtime
  • Up to 35 minutes of runtime with provided batteries and 4 hour charge time
  • 5-year warranty
  • Learn More about the RYOBI Platform Here
  • Click here for more information on Electronic Recycling Programs
  • California residents

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

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BrandRYOBIRYOBIGreenworksRYOBI
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Price
Ratings
(227)
(513)
(229)
(148)
Size of Yard1/4 - 1/2 Acre1/4 - 1/2 Acre1/2 - 1 Acre1/4 - 1/2 Acre
Power TypeBatteryBatteryBatteryBattery
FeaturesAdjustable Cutting Height,Adjustable Handlebar,Adjustable Speed,Bagger,Battery level indicator,Brushless Motor,Foldable handle,Headlights,Mulching Lawn Mower,No Oil Change Required,Residential,Rust ResistantAdjustable Cutting Height,Adjustable Speed,Assembly Required,Bagger,Battery level indicator,Brushless Motor,Collapsible,Electronic Ignition,Foldable handle,Headlights,Mulching Lawn Mower,Residential,Single-lever height adjustment,Tool-free adjustmentsBagger,Brushless MotorAdjustable Cutting Height,Adjustable Handlebar,Adjustable Speed,Assembly Required,Bagger,Battery level indicator,Blade Brake,Brushless Motor,Foldable handle,Headlights,Keyed start,Mulching Lawn Mower,No Oil Change Required,Residential,Rust Resistant,Single-lever height adjustment
Drive TypeRear-wheel DriveRear-wheel DriveRear-wheel DriveRear-wheel Drive
Start TypePush Button StartPush Button StartPush Button StartPush Button Start
RefurbishedNoNoNoNo
Cutting Width21 inches21 inches24 inches21 inches
Rear Wheel HeightHigh WheelHigh WheelHigh WheelHigh Wheel
Recommended TerrainFlat,SlopedFlatFlat,SlopedFlat,Sloped
View ProductView ProductView ProductView Product

Specifications

Dimensions

Assembled Depth (in.)
66.5 in
Assembled Height (in.)
42 in
Assembled Width (in.)
22.5 in
Blade Length (in.)
20.75 in
Cutting Width
21 inches
Front Wheel Size (in.)
8
Mower Deck Width
21 in
Rear Wheel Size (in.)
10

Details

Amperage (amps)
0 A
Assembly Required
Yes
Battery Amp Hours
6 Ah
Battery Run Time (min.)
35
Battery Type
Lithium Ion
Battery/Charger
(1) 6 Ah Battery & Charger Included
Charge Time (hours)
4
Charger Included
Charger Included
Cutting Height Options
7-position
Cutting Options
Bag,Mulch
Deck Material
12 Gauge Steel
Deck Type
Stamped
Drive Type
Rear-wheel Drive
Engine Torque (ft.-lb.)
0.0
Features
Adjustable Cutting Height,Adjustable Speed,Assembly Required,Bagger,Battery level indicator,Brushless Motor,Collapsible,Electronic Ignition,Foldable handle,Headlights,Mulching Lawn Mower,Residential,Single-lever height adjustment,Tool-free adjustments
Included
Bagger,Battery(s),Charger,Wheels
Lawn Mower Type
Self-Propelled Lawn Mower
Maximum Cutting Height (in.)
4.0
Minimum Cutting Height (in.)
1.5
Mower Size Type
Standard
Number of Batteries Required
1
Number of Blades
1
Number of Handlebar Positions
2
Number of Total Batteries Included
1
Power Type
Battery
Product Weight (lb.)
79.2 lb
Rear Wheel Height
High Wheel
Recommended Terrain
Flat
Refurbished
No
Returnable
90-Day
Size of Yard
1/4 - 1/2 Acre
Start Type
Push Button Start
Tools Included
Battery,Charger,Mower
Voltage (v)
40v
Walk Behind Mower Type
Self Propelled

Warranty / Certifications

Certifications and Listings
UL Listed
Manufacturer Warranty
5-Year Limited Tool Warranty, 3-Year Limited Battery Warranty

Questions & Answers

62Questions43Answers

Does this mower mulch

Asked by Eric April 25, 2021
3
Answers

Eric, thank you for your interest in the RYOBI 21 in. 40-Volt Brushless Lithium-Ion Cordless SMART TREK Self-Propelled Walk Behind Mower with 6.0Ah Battery and Charger. Yes but you must install the Mulch Plug in place of the grass catcher. Thank you for asking, If you have further questions and would like to speak with a RYOBI Customer Experience Professional, please call, 1-800-525-2579 M-F from 9am-6pm EST. Hope this helps! - Vini

how do I get a warranty replacement for a defective battery?

Asked by sp April 19, 2021
5
Answers

SP, thank you for your interest in the RYOBI 21 in. 40-Volt Brushless Lithium-Ion Cordless SMART TREK Self-Propelled Walk Behind Mower with 6.0Ah Battery and Charger. If your battery is not working and it is still under warranty you can give us a call and we can get you set up with a replacement. Thank you for asking, If you have further questions and would like to speak with a RYOBI Customer Experience Professional, please call, 1-800-525-2579 M-F from 9am-6pm EST. Hope this helps! - Vini

Is it possible to buy just the mower without battery

Asked by BellaAnn April 8, 2021
3
Answers

I don't believe you can get it without the battery. All the ones I looked at only came with the battery.

7- Position single-point height adjustment .Will not lock into set height. Will move out of adjus...

Asked by Luke November 16, 2020
5
Answers

Hi Luke, Contrary to what one person posted here, the mower does have a 7- Position single-point height adjustment (1-1/2 in. - 4 in.). If your mower will not stay at the set height, it may be becaus your blade is out of balance and excessively vibrating, thus causing the mower to likely drop during usage. Please check this and/or contact Ryobi. The warranty pamplet with the contact info can be found on this page under the Info & Guides section.

Only had this for a couple weeks and it keeps cutting off. Bought a second battery, same thing. L...

Asked by Mike November 9, 2020
5
Answers

Check the button on the right side by handle. They come loose and could cause machine to cut off.

How long can you mow with one charge on the battery?

Asked by Mower August 27, 2020
5
Answers

You'll get your weekly cut in a new 6ah battery, don't have any history on say 'a 3 year old' battery, I already have a battery that won't take a full charge.

Does it have reverse?

Asked by JuanE August 26, 2020
5
Answers

No, I mow in forward.

I recieved everything but the battery charger, I have the cord for the charger but not the charger!!!

Asked by CWardplb August 21, 2020
5
Answers

Contact Ryobi on line. They will take care of it. Or talk to Home Depot where you purchased it.

What is the cutting torque

Asked by OkcThunder August 4, 2020
2
Answers

Light trimming [cutting] of grass, definitely a 'city' mower. I'm have trouble with a the 'safety switches' Ryobi installed, mower quits running all the time, not ready for prime time use.

Is 6Ah battery required?

Asked by TJ August 2, 2020
5
Answers

I used a 2.6 ah from a weed trimmer because the 6.0 arrived defective.

21 in. 40-Volt Brushless Lithium-Ion Cordless SMART TREK Self-Propelled Walk Behind Mower with 6.0Ah Battery and Charger - page 2

Customer Reviews

  • 3.7
    out of 514 reviews
  • 66% recommend this product
Filter by:
Showing 1-10 of 514 reviews
Loving this new mower! Better than gas...
We are loving this new mower!! It is, hands down, the easiest to use mower I have owned. My teen often mows the lawn for us and he was quite happy to ditch our previous mower and use this one. Feature thoughts breakdown: - Self propelled - very smooth and easy to use. Two options for variable speed adjustments to suit your style. I walk slower than my son so I set the max speed lower and went full throttle. EXTRA...you can self propel without the blades running to walk it back to the garage! - Wheels/Traction - Wheels are right sized for easy pushing and they stay on line and don't wobble. Traction is nice for any slope you may deal with. - Ease of adjustment - Want to adjust height...one hand 2 seconds! Want to set handle height or fold it up...one hand 2 seconds! Trust me when I say it is easier than any mower or baby stroller you have struggled with in the past. - Power - Handles my Bermuda grass without any hesitation. Other mowers will bog down at times and make me cut slower. - Battery life - My yard is over half an acre and we had two bars left on the second battery. Very happy and have confidence that we won't be forced to take a charging break before it's done. - Compatibility - The best thing about this mower is that it uses the same batteries that are used in my other tools like the string trimmer and backpack blower. - Space saving - We couldn't fold and stand up our gas mower so it took up tons of room in the garage. You can see in my picture that this guy fits neatly in a convenient/unused location between doors. What more can I say?? It checks all of the boxes I have for a push mower. Did I leave anything out?
by Coy
Broken after 4 uses
I had high hopes for this product as it cut really well and was easy to use. The battery didn’t last quite as long as what was expected but it came with the two batteries and if I worked hard enough I could get through my lawn without having to charge the battery again to finish. The sound factor was great and the cut grass looked good. Unfortunately after 3 1/2 uses the front right wheel came off. There’s no way to reinstall since it’s a weld attachment and not a bolt attachment. So after only 4 mows my $500 law mower is unusable.
by Sean
Pleasantly Surprised
[This review was collected as part of a promotion.] I bought this last night and put it to work today. My first electric mower... bought it for our rental place for the quiet battery operation between tenants and no hassles with noisy gas powered equipment (I’m listening to my neighbours right now) Pleasantly surprised with the smooth operation for the 1/2 acre lot and easy set up. The one thing I would mention is the tag on the key says rotate key 180 degrees to activate battery. Might want to say remove key and then rotate key 180, reinstall key. I was thinking car ignition for a moment :) Battery life was good, no issues. The bag is large so no need to empty continuously. There is some lag time with self propelled feature - didn’t use it much. All in all it was a good first day and I enjoyed using it. Oh, my neighbour even commented on the quiet operation. Super easy height adjustment as well.
by Vinster50eh
Started strong, finished weak
I had the lawnmower for six months. During that time it cut the grass very well. I was very impressed with the mulching and consistency of the cut. The construction, engineering, and manufacture of the lawn mower has left me unimpressed. Day one, the headlights came off. Within a couple of uses screws and bolts were dropping off in the course of cutting grass. I brought it into the repair shop within six months because the handle bar broke so that the power walk behind would not work. The mower could no longer fold the handle bar down to be compact storage.
by RQuad
Response from ReviewsOct 21, 2020
Hello, RQuad - We are very disappointed to read about these issues you've had with the mower! Would you mind sending us an email at reviews@ryobitools.com? Let's connect and see if there's anything we can do to leave you with a positive experience.
This is close to wanting to keep it except for a couple shortcomings. First reading other reviews...
This is close to wanting to keep it except for a couple shortcomings. First reading other reviews many would have been addressed had you called Ryobi CS which I did when it intermittently stopped with plenty of battery life. Handle had to be absolutely all the way up when you lock it and problem solved. This has a mulching feature. It does NOT mulch. It does not have a mulching blade and all the mulching block does is create a blob of grass weighing down the unit as it fills every bit of empty space in the blade compartment. Most important and the reason I am returning it is the claim it can mow up to a half an acre on one charge. It does not come close to a quarter acre heck not even 1/8 an acre before it is dead. My back yard is 80X50 with a porch and shed making about 3600 SQ FT. On a full charge it did about 3/4 and I shut off the self propel to get more cutting or it would have not done 2/3 of that 3600 SQ FT. With tax an extra battery would be $200.00, sorry too much. It cut nicely and was decent in handling and noise but it needs 7,5-8AMPS to cut just a front or back yard for an average postage stamp lot. Too bad, I really liked this mower but to have to keep a gas mower to finish the back yard does not work for me
by Wulfmann
7 people found this helpful
I have many of Ryobi power tools and love them. So when my gas mover dead, I decided to get their...
I have many of Ryobi power tools and love them. So when my gas mover dead, I decided to get their lawn mover. Charged the battery and me and my son took it out to cut and trim the yard. What would have taken 30 minutes before turned into three hours. We have a small hill in the front yard and the mover would stop every time we tried to mow it. We live in south Florida so it's really not a hill by any means. Also any time we hit a good bump it would stop. So I'm taking it back and will talk with my neighbor across the street to see what brand they have because they have no problems with their mower
by CJS
Response from RYOBIOutdoorsJul 4, 2020
Hello, CJS - We are so sorry to hear that your mower keeps shutting down! If you would, will you please contact us at reviews@ryobitools.com? We'd really appreciate a chance to speak with you, so we can try and move this experience in a better direction! RYOBIOutdoorTools
7 people found this helpful
don’t buy
2016 i had bought a ryobi mower and loved it with the exception of the 5ah battery not being enough to mowe 1/2 an acre. Come June 2020, I purchased this mower for fathersday. One of the two locks for the self-propel was broken. When the handle system is folded one of the grooves was grinding the aluminium. After the second use the self propel became stuck on high. I attempted to call custumer support to get a replacement but never got someone on the phone. I took it back to home depot. I want to inform everyone that I purchased this mower online from homedepot for $379.00 NEW. DONT pay more than that for this mower
by Homiedepot
Response from RYOBIOutdoorsJun 25, 2020
Hello, homiedepodude - We are very disappointed to hear about the trouble you had with the mower's self-propelled system! This isn't the experience we want for you and we apologize! And we appreciate your taking the time to share this feedback with us. And if you'd like to discuss your experience further, then please feel free to email us anytime at reviews@ryobitools.com. RYOBIOutdoorTools
12 people found this helpful
This lawn mower is slick and easy to use nice you have it up and running. Know that the handle ha...
This lawn mower is slick and easy to use nice you have it up and running. Know that the handle has to be fully extended to run, but the fact that it’s electric and has self propel are awesome features. It requires little-to-no maintenance as a result, and it has multiple settings for length of blade. The battery also lasts long enough to get a good cut, and it charges easily. Overall there’s really nothing negative to say, it’s been great for me. Much better than any gas mower I’ve had.
by dcline
3 people found this helpful
When my gas-powered self-propelled, mulching mower succumbed to "ethanol poisoning" (small engine...
When my gas-powered self-propelled, mulching mower succumbed to "ethanol poisoning" (small engines and ethanol do not get along well), I decided to check out rechargeable electrics, given there would be no need for gas cans, oil changes, etc. And the technology for these has vastly improved. For about the same price as a higher end self-propelled, mulching gas mower, I bought this one instead. Entirely pleased with this mower! Battery charge life of about 35 minutes is fine, given it takes me only about 15 to do my lawn. The lithium-ion battery recharges in 4 hours or less. While I had to get used to controlling the self-propel speed, I did get the technique. After 5 mowings, I've found this mower is quieter than a comparable gas mower and does at least as good a job in mowing and mulching.
by Chuck
3 people found this helpful
Battery operated is the way to go
I received my Ryobi 21 inch 40 volt lawn mower a week ago. Assembly was easy - read and follow the instructions. Going from a gas operated to battery operated lawn mower will take a little time. The self-propelled feature is different, but can be mastered - need to ensure lever is in correct position. The lawn mower is quiet - you hear the blade wind blowing. I have the Ryobi 40 volt 4.0 amp battery as a backup. The mulching piece or grass catcher and starter key has to be in place to start and operate the mower. Overall i really like the mower. I have to change my ways becuase the battery-operated lawn mower is different. I highly recommend this mower.
by wewomack
Showing 1-10 of 514 reviews