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Ryobi 40V HP Brushless 21" Push Mower Kit

Push / Walk-Behind mower · Model RY40HPLM05K · Residential-duty · Battery

$520 Ryobi list price

Checked 23 Oct 2026 on the Ryobi product page. Tracked since 17 Sep 2026: low $520, high $599.

37 daily checks

Manufacturer list price only — it excludes tax, freight, dealer setup and any local discount, and dealers set the final price.

The Ryobi 40V HP Brushless 21 in Push Mower Kit is a residential-grade battery walk-behind mower, a quiet, low-maintenance choice for smaller yards, with a 21-inch deck and a 40 V battery. It weighs 64 lb (29 kg).

Also sold as: 40V HP Brushless 21 in Push Mower Kit (Kit (battery & charger included))

At a glance

Power Source

battery

Cutting Width

21 in (533 mm)

Drive Type

Push

Weight

64 lbs (29 kg)

Compare this mower: Pick another Ryobi push / walk-behind or pick from every push / walk-behind mower or quick compare: vs 18V ONE+ 13 in Push Mower · vs 18V ONE+ 13 in Push Mower Kit · vs 18V ONE+ HP Brushless 16 in Push Mower

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Greenworks 40V 21 in Cordless Battery Self-Propelled Lawn Mower

Deck 21 in (533 mm) · 40 V battery

Warranty 3 yr (this model: 5 yr)Max cut height 3.6 in (91 mm) (this model: 4 in (102 mm))

Why: Same class: push / walk-behind · Same 21 in deck · Battery powered, like this model · Residential-duty, like this model · 40 V battery (this model: 40 V) · By Greenworks, a different maker
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Greenworks 40V 21 in Cordless Battery Brushless Push Lawn Mower

Deck 21 in (533 mm) · 40 V battery, 5 Ah

Warranty 3 yr (this model: 5 yr)Weight 58 lbs (26.3 kg) (this model: 64 lbs (29 kg))

Why: Same class: push / walk-behind · Same 21 in deck · Battery powered, like this model · Residential-duty, like this model · 40 V battery (this model: 40 V) · By Greenworks, a different maker
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Kress 40 V lawn mower

Deck 21 in (533 mm) · 40 V battery

List price $500 (this model: $520)

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Toro 60V Max 21 in. Recycler Self-Propel Lawn Mower

Deck 21 in (533 mm) · 60 V battery

Max cut height 3.7 in (95 mm) (this model: 4 in (102 mm))List price $499 (this model: $520)

Why: Same class: push / walk-behind · Same 21 in deck · Battery powered, like this model · Residential-duty, like this model · 60 V battery (this model: 40 V) · By Toro, a different maker
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Makita 40V max XGT Brushless 21 in Self-Propelled Commercial Lawn Mower

Deck 21 in (533 mm) · 40 V battery

Weight 73 lbs (32.9 kg) (this model: 64 lbs (29 kg))

Why: Same class: push / walk-behind · Same 21 in deck · Battery powered, like this model · Residential-duty, like this model · 40 V battery (this model: 40 V) · By Makita, a different maker
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Chosen by stated rules, not opinion: same class, a deck within 2 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.

Engine

Ryobi 40V HP Brushless 21 in Push Mower Kit engine specifications
Power Source	battery
Fuel Type	Battery / Electric

Electrical

Ryobi 40V HP Brushless 21 in Push Mower Kit electrical specifications
Voltage	40 V

Deck

Ryobi 40V HP Brushless 21 in Push Mower Kit deck specifications
Cutting Width	21 in (533 mm)
Min Cut Height	1 in (25 mm)
Max Cut Height	4 in (102 mm)
Discharge	Mulching, Bagging, and Side Discharge

Drive

Ryobi 40V HP Brushless 21 in Push Mower Kit drive specifications
Drive Type	Push

Dimensions

Ryobi 40V HP Brushless 21 in Push Mower Kit dimensions specifications
Weight	64 lbs (29 kg)

General

Ryobi 40V HP Brushless 21 in Push Mower Kit general specifications
Bagger Capacity	2 bu (70.5 L)
Warranty	5 yr

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Specs verified against the manufacturer spec sheet on Jun 6, 2026 — ryobitools.ca.

See all Ryobi mowers and specs ›

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Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.

What the specs work out to

Figures MowerFacts computes from Ryobi’s own numbers — not published by the manufacturer.

Gate & trailer fit

32 in gateFits
36 in gateFits
48 in gateFits

Needs at least 27 in of clearance (estimated).

Fit uses the deck width plus 6 in for the discharge chute, because Ryobi doesn't publish an overall width — measure before buying if a gate is tight.

Ryobi 40V HP Brushless 21 in Push Mower Kit questions

What size deck is on the Ryobi 40V HP Brushless 21 in Push Mower Kit?

The Ryobi 40V HP Brushless 21 in Push Mower Kit has a 21-inch (533 mm) cutting deck.

How much does the Ryobi 40V HP Brushless 21 in Push Mower Kit weigh?

The Ryobi 40V HP Brushless 21 in Push Mower Kit weighs 64 lb (29 kg) as specified by Ryobi.

How much does the Ryobi 40V HP Brushless 21 in Push Mower Kit cost?

Ryobi's published list price is $520, checked 23 October 2026. That excludes tax, freight, dealer setup and any local discount — dealers set the final price.

What is the Ryobi 40V HP Brushless 21 in Push Mower Kit built for?

Residential-duty push / walk-behind mower. Built for home-lawn use.

Source: Ryobi (manufacturer) · archived copy