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Walk-Behind Mowers

Brand: Ryobi

Ryobi 40V HP Brushless Self-Propelled Multi-Blade Mower Kit | 21-in

Mow up to 3/4 acre with ease using this powerful cordless mower!

• 40V HP Technology Delivers More Power Than a 170cc Gas Mower
• Ideal for 3/4 Acre With up to 75 Min. Runtime
• Industry's Best Cut Performance with CROSS CUT Multi-Blade System

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The RYOBI 40V HP Brushless 21″ Self-Propelled Multi-Blade Mower Kit, ideal for up to 3/4 acre yards, delivers gas-equivalent performance with two 40V 6Ah batteries powering a brushless motor, offering up to 75 minutes of runtime with two active ports. The 21-in. deck adjusts to cutting heights from 1 to 4 in, featuring the CROSS CUT™ Multi-Blade System for superior mulching, side discharging, or bagging with a 2-bushel capacity, reducing clumping and maximizing bag space. The SMART TREK™ adaptive speed adjusts to your pace, while the CUT COMMAND CENTER™ monitors runtime, blade life, and activates turbo mode or lights. The mower recharges with the included 120V 295W Rapid Charger, features one-touch folding handles for vertical storage, and weighs 79.2 lbs. Compatible with any RYOBI 40V battery. • Battery: Two 40V 6Ah with 3-year warranty and LED fuel gauge. • Cutting Deck: 21-in deck with 9.66 lb-ft torque. • Charger: 120V 295W Rapid Charger with 3-year warranty. Box includes: Self-Propelled Mower, 2 x 40V 6Ah Batteries, 40V Rapid Charger.

Battery

  • Voltage: 40V
  • Capacity: 6Ah (x2)
  • Runtime: Up to 75 min
  • Charge Time: Not specified
  • Warranty: 3-year limited

Cutting Deck

  • Width: 21 in
  • Height Range: 1-4 in
  • Positions: Not specified
  • Blade System: CROSS CUT™ Multi-Blade
  • Material: Not specified
  • Cutting Methods: Mulch/Side Discharge/Bagging
  • Bag Capacity: 2 bushels

Drive System

  • Type: Self-propelled
  • Speed Control: SMART TREK™ adaptive variable speed

Handle & Comfort

  • Handle Type: One-touch folding

Additional Features

  • Headlights: Yes (via CUT COMMAND CENTER™)
  • Turbo Mode: Yes
  • Max Towing Capacity: Not specified

Warranty

  • Tool Warranty: 5-year limited
  • Battery/Charger Warranty: 3-year limited

Dimensions

  • Height: Not specified
  • Length: Not specified
  • Width: Not specified
  • Weight: 79.2 lbs

Manufacturing

  • Location: Made in USA with global materials

Battery

  • Voltage: 40V
  • Capacity: 6Ah (x2)
  • Runtime: Up to 75 min
  • Charge Time: Not specified
  • Warranty: 3-year limited

Cutting Deck

  • Width: 21 in
  • Height Range: 1-4 in
  • Positions: Not specified
  • Blade System: CROSS CUT™ Multi-Blade
  • Material: Not specified
  • Cutting Methods: Mulch/Side Discharge/Bagging
  • Bag Capacity: 2 bushels

Drive System

  • Type: Self-propelled
  • Speed Control: SMART TREK™ adaptive variable speed

Handle & Comfort

  • Handle Type: One-touch folding

Additional Features

  • Headlights: Yes (via CUT COMMAND CENTER™)
  • Turbo Mode: Yes
  • Max Towing Capacity: Not specified

Warranty

  • Tool Warranty: 5-year limited
  • Battery/Charger Warranty: 3-year limited

Dimensions

  • Height: Not specified
  • Length: Not specified
  • Width: Not specified
  • Weight: 79.2 lbs

Manufacturing

  • Location: Made in USA with global materials

How Does Shipping Work and How Long Does It Take?
We understand how important it is for your new lawn mower to arrive safely and in perfect condition. We partner with professional carriers to ensure every order is handled with expert care from start to finish.

  • Professional Packaging – We use high-quality, industry-standard materials to protect your item during transit.
  • Full Insurance – Every order is fully insured, giving you peace of mind in the unlikely event of damage.
  • Real-Time Updates – Stay informed with notifications at every step of the shipping process.

Order Processing & Shipping Times
Orders are processed and shipped within 1-3 business days (excluding weekends and holidays). All items are delivered within 10 business days from the date of shipment. As your delivery date nears, the shipper will contact you to coordinate a seamless drop-off.

Before ordering, please verify your shipping address to prevent delays. Your satisfaction is our priority, and we’re committed to making your shopping experience smooth and enjoyable. Have questions? Email us at support@lawn-rider.com—we’re here to help!

10 reviews for Ryobi 40V HP Brushless Self-Propelled Multi-Blade Mower Kit | 21-in

4.7 out of 5 stars (based on 10 reviews)
Excellent80%
Very good10%
Average10%
Poor0%
Terrible0%

 

July 14, 2025

I’ve used this mower for three years with great results. I’m a gas mower holdout – but I am very impressed with the mower. I recommend to friends – in fact, a neighbor bought one on my recommendation. It mows well, and the batteries mow my entire yard. That being said, I am VERY disappointed in Ryobi. My mower was part of the recall. And while I have no problem with the recall, they bungled my replacement. I’ve been 7 weeks without a mower: it’s clear, based on an email from Ryobi, that my replacement mower was not ordered. I called them back and they told me “everything is fine – just keep waiting”. They would not help beyond that. So another month has passed and no mower. Now, they wlll finally take my call but claim that the replacement was for a Ridgid saw. ?!?!

Michel
June 12, 2025

Great power and easy to use. No more tune-ups either.

David
May 19, 2025

I’ve had the Ryobi 40V 21″ mower for about a month now and have used it for 4 mows. Very happy with the product so far. Strong self-propelling, two 6 Ah batteries, lightweight but feels well built. The bag is a little clunky to snap on and take off, but I only used it to test and don’t normally bag so isn’t a big deal for me. You use both batteries at the same time in this unit for maximum power and runtime. For me that was about 30 minutes in thick grass and steep inclines. It was enough for all my trimming without having to stop for a charge.

WB
May 17, 2025

I bought this mower in March 2025. Have used it 5 times on a 1/3 acre lawn. Easy to use. Nice clean cut. Self propelled feature is nice. Have used the light for night mowing. Charge time is about 45 minutes per battery. Takes about 40 minutes to mow my lawn and have 1 of 4 bars left, so skeptical of 80 run time using the two batteries. However, for me it is perfect. I have enjoyed this mower and would recommend to anyone have a small lawn like mine.

Tom man
May 15, 2025

The mower itself works well so far. There are a couple design flaws that need addressing like the handles to make it go forward are to long. You have to completely let go of the mower to make it stop. I shortened one side and now it’s fine.

Tony93

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